C and C++ Forum RSS Feed

Help on homework assignment

Fri, 03 Jul 2009 16:54:37 -0700

I need to write a function called distance that calculates the distance between two points (x1,y1) and (x2, y2). All numbers and return values should be of type double.

Here is what i have so far.

#include "stdafx.h"
#include <iostream>
#include <cmath>

using namespace std;

int main()
{
double x1,x2,y1,y2,d; //declaring variables

cout << "Please enter the first two points\n"; //prompting usering for the first two points.
cin >> x1 >> y1;

cout << "Please enter the last two points\n"; //prompting the user for the last two points.
cin >> x2 >> y2;

//distance function
double distance(double x1, double x2, double y1, double y2)
{
d = (sqrt (pow (double X2) - (double X1) ) + ( pow (double Y2) - (double Y1));
return d;
}

return 0;
}

how to do a sequential search in C

Fri, 03 Jul 2009 14:49:15 -0700

I'm trying to do a binarysearch in this piece of code that i have here. if the array has been sorted use a binary search, if it is not sorted use a sequential search. I've manage to get the binarysearch section of the code working, however, no joy with the sequential search.

Can anyone show show me to accomplish this? i'm a newbie to the language, and i'm still learning this stuff. maybe a starting point, then i might be able to figure out the rest of it out myself.

thanks

#include <stdio.h>
#include <ctype.h>//needed for toupper function
#include <time.h>
#include <stdlib.h>
#define SIZE 5


char menuVersion1 ();
void  menuVersion2 (char *);
void fill ( int [] , int * );// void fill ( int * );
void print ( int [] );
void sort ( int [] , int *  );

int main ()
{
    char selection;
    int A [SIZE] = {0}; // A is an array of 5 integers
    int sorted = 0;
    
    srand ( time (NULL) );

    do
    {
      //selection = menuVersion1 ();
      menuVersion2 ( &selection );
      
      

      switch ( selection )
      {
         case 'F' : fill (A , &sorted);
         break;
         
         case 'P' : print (A);
         break;
         
         case 'S' : sort (A, &sorted);
         break;
         
         
         case 'Z' : printf ("Goodbye!\n\n");
         break;
         
         case 'Q' : printf ("Query coming up!\n\n");
                    if ( sorted == 0 ) printf ("the array is not sorted!\n");
                    else printf ("the array is sorted!\n");
          break;
         
         default : printf ("\a\a Invalid selection!!!\n\n");    
      }
 
    }while ( selection != 'Z');
    
    system ("pause");
    return 0;
}
//----------------------------

char menuVersion1 ()
{
     char option;
     
     printf ("\n--------\nF-Fill the array \n");
     printf ("P-Print the array\n");
     printf ("S-Sort the array\n");
     printf ("Z-Exit\n");
     printf ("Enter your selection :");
     scanf(" %c", &option);

     return toupper(option);


}

//--------------------------------
void  menuVersion2 (char * option)
{
     
     
     printf ("\n--------\nF-Fill the array \n");
     printf ("P-Print the array\n");
     printf ("S-Sort the array\n");
     printf ("Q-Query the array\n");
     printf ("Z-Exit\n");
     printf ("Enter your selection :");
     scanf(" %c", option);

     *option = toupper(*option);
}
//---------------------------------
void fill ( int A [] , int * sorted)
{
   int walker;
   for (walker = 0 ; walker < SIZE ; walker ++)
   {   
      A[walker] = rand ()%999 + 1;    
   }
   *sorted = 0;
   
   printf ("ARRAY LOADED!!!\n");
     
}

//----------------------------------------
void print ( int A [])
{
   int walker;
   printf ("\nHere are the elements ...\n");
   for (walker = 0 ; walker < SIZE ; walker ++)
   {   
      printf ("%d\n", A[walker] );
   }
   
   printf ("\a ARRAY PRINTED!!!\n");
     
}
//------------------------
void sort ( int A[] , int * sorted )
{

   int i , j , temp ;
   *sorted = 1;
   
   for ( j= 0; j<SIZE ; j++)
   {
    for ( i=0; i<=SIZE-2 ; i++)
    {
       if ( A[i] > A[i+1])
       {
            temp = A[i];
            A[i] = A[i+1];
            A[i+1] = temp;
       }
    }
  }



}

Simple Sound from a C++ program?

Thu, 02 Jul 2009 14:51:09 -0700

For a course on musical acoustics, I've written a program that allows the user to draw a wave shape. I'd like the user to be able to hear that wave shape. The program is in C++, and the "shape" consists of 300 integer entries, so I'd like that file somehow to "loop" as it's converted to sound.

The program uses OpenGL. It's presently on a Dell (using Linux), though I'd like to be able to use it on a Mac (OSX) as well.

Thanks for any help you can give.

Buffer overflow c/c++

Thu, 02 Jul 2009 14:23:42 -0700

Hello,
how can I find a buffer overflow in C/C++.

For example:

int x[10];
int y[5][5];
int z[5][5][2];

x[12] = 0;
y[3][7] = 8;
z[2][6][1] = 8;

Thanks

Fuzzy Logic Pattern Matching

Wed, 01 Jul 2009 17:51:54 -0700

I am developing an application which at one point needs to do some pattern matching. Specifically, I have 2 similar linear sets of data. I want to match the points at which the data goes up and then down (a hump). I want to find the best matches for the hump shapes in order to match up the data. The hump may have a different number of values between the 2 sets of data. For instance, data set A may have a hump consisting of 10 values from start to finish, but the corresponding hump in data set B may only have 8 values.

I've done some research, and fuzzy logic seems to be the best way to do this, but I am not experienced enough with fuzzy logic theory to fully understand how to do this. I've tried pattern matching using normal (crisp) programming, and it simply doesn't give good results in most cases.

If anyone could give me advice as to how to set up the fuzzy inputs, maybe even some source code, I'd really appreciate it.

Thanks!

UDP Server. It won't bind()

Sun, 28 Jun 2009 12:33:38 -0700

Hello. I'm trying to make an UDP server which will do certain things on one's computer based on the messages received.

That's how far i got:

#include "windows.h"
#include "winsock2.h"

int main()
{
    WSADATA wsaData;
    if(WSAStartup(0x0202, &wsaData))
    {
        MessageBox(NULL,"Call to WSAStartup() failed", "Error!", MB_ICONSTOP);
        WSACleanup();
        return 0;
    }
    else
    {
        if(wsaData.wVersion != 0x0202)
        {
            MessageBox(NULL,"Wrong socket version!", "Error!", MB_ICONSTOP);
            WSACleanup();
            return 0;
        }
    }

    sockaddr_in serverSockAddrIn;
    memset(&serverSockAddrIn, 0, sizeof(serverSockAddrIn));
    serverSockAddrIn.sin_family = AF_INET;
    serverSockAddrIn.sin_port = htons(14564);
    serverSockAddrIn.sin_addr.s_addr = htonl(INADDR_ANY);

    SOCKET serverSocket;
    serverSocket = (AF_INET, SOCK_DGRAM, IPPROTO_UDP);

    if(serverSocket == INVALID_SOCKET)
    {
        MessageBox(NULL, "Socket initialization failed!", "Error!", MB_ICONSTOP);
        WSACleanup();
        return 0;
    }

    if(bind(serverSocket,(sockaddr*)&serverSockAddrIn, sizeof(serverSockAddrIn)) == SOCKET_ERROR)
    {
        MessageBox(NULL, "Binding failed!", "Error!", MB_ICONSTOP);
        WSACleanup();
        return 0;
    }

    WSACleanup();
}

I compiled the code just to test and see if there are any spelling errors and for my surprise o noticed that it won't bind(). I've checked MSDN and several examples. Everything seems to be fine according to those examples.

Why do you think this is happening? I've checked the port i am bind(ing)() to and it's free.

What is wrong with the following code

Fri, 26 Jun 2009 09:23:39 -0700

template <class T> class TGrid
{
protected:
// T SubGrid[GRIDSIZE];
public:
void Intialize(void);
// void AddEnemy(unsigned char, unsigned char, unsigned char);
};

template <class T> void TGrid<T>::Intialize()
{
unsigned short n;
for(n=0;n<GRIDSIZE;n++){}
// SubGrid[n].Intialize();
}

No this isn't the whole program but this is the section Norton thinks is a virus. I am hoping that someone on here know because no one a norton does

And no the answer isn't norton sucks I already know that and am switching I am just curious about why this harmless piece of code trigger a virus alert from norton
1 second ago - 4 days left to answer.

Question on templates?

Fri, 26 Jun 2009 05:28:39 -0700

Ok I have the following code

template <class T> class TLinkList
{
protected:
TItem<T> FHead;
TItem<T> *FItem;
unsigned short FCount;
unsigned short FPos;
public:
void Intialize(void);
void Add(T Data)
{
if(FCount == 0)
{
FItem->Cur = Data;
FItem->Next = new TItem<T>;
FHead.Next = FItem;
}
else
{
FItem = FHead.Next;
while(FItem->Next != NULL)
Next();
FItem->Cur = Data;
FItem->Next = new TItem<T>;
}
FCount += 1;
}

void Next()
{
FItem = FItem->Next;
FPos += 1;

}
inline unsigned short Count(){return FCount;}
};

template <class T> void TLinkList<T>::Intialize()
{
FHead.Next = new TItem<T>;
FItem = new TItem<T>;
FCount = 0;
FPos = 0;
}

When all in the same file it compiles fine, But I want to be able to move the body of the functions to the .cpp file so the .h file isn't so cluttered(not mention is bad form. problem is when I do that I get a liker error. How do I get it to compile with the class defintions in the header file and the Body of the fuctions in the .cpp file?

cout problem on chinese zodiac program

Thu, 25 Jun 2009 07:52:46 -0700

Hello. I'm making a Chinese zodiac program for fun, but regardless of what year I input I always get back "You were born in the year of the Dragon."
Thanks

#include <iostream.h>

main()
{
int year; // four digit year
cout << "Enter your four digit birth year: ";
cin >> year;
if (year == 1976^1964)
{cout << "You were born in the year of the Dragon\n";}

else if (year == 1981)
{cout << "Your were born in the year of the Rooster\n";}

else if (year == 1982)
{cout << "Your were born in the year of the Dog\n";}

return(0);
}

prefered C++ environment, Help needed

Wed, 24 Jun 2009 17:06:17 -0700

Hello,

I have been programming in C/C++ and other languages in the past.
Borland C++, Windows Visual C++ console apps, Embedded controlers( Microchip MCC18), Visual Basic, others.

Can someone please advise me of an appropriate starting platform to create Windows applications (on XP and Vista) in C/C++ without spending months of reading before my first Hello world program.

I find most platform so criptic. MFC is non sense ! takes forever to learn.

All I want to do is to create windows, place text and graphic, communicate with serial port or USB, etc ...

Please avoid Microsoft tools. I am looking for open source, mainly.

I tried FreeBasic, it is nice but I prefer C.

I need a platform that won't take forever to learn.

Please help !

Hans

Can i more easy that program

Wed, 24 Jun 2009 15:53:04 -0700

#include <stdio.h>

int main()
{
int b,c,d,e,f=0,g=0,h=1;
char a[50];
for (b=0; b<50; b++) {
a=0;
}
printf("Enter a String : ");
gets(a);
for (c=0; c<50; c++) {
if (a[c]==0) {
break;
}
}
e=c;
for (b=c; b>0; b--) {
for (d=b; d>0; d--) {
printf(" ");
}
for (d=0; d<=f; d++) {
if (d==0||d==f) {
printf("%c", a[g]);
}
else if(b!=1){
printf(" ");
}
if (b==1&&h==1) {
printf(" ");
}
if (b==1) {
if(h==c){
break;
}
printf("%c ", a[h]);
h++;
}
}
g++;
f+=2;
printf("\n\n");
}
return 0;
}

problem with the refresh()

Wed, 24 Jun 2009 04:43:30 -0700

I am new to encurses.
I am trying to get a multicast message and print it on to the screen using ncurses.

 
initscr();				
row = 0;
col = 0;
main_pid = getpid();
refresh();

for (;;) //Run forever
{          
    /* clear the receive buffers & structs */
    memset(recv_str, 0, sizeof(recv_str));
    from_len = sizeof(from_addr);
    memset(&from_addr, 0, from_len);

    /* block waiting to receive a packet */
    if ((recv_len = recvfrom(sock, recv_str, MAX_LEN, 0,(struct sockaddr*)&from_addr, &from_len)) < 0) 
    {
      perror("recvfrom() failed");
      exit(1);
    }
	strcpy(str,recv_str);
	
    /* output received string */
    move(row,col);
    printw("\nReceived %d bytes from %s: %s ", recv_len, 
           inet_ntoa(from_addr.sin_addr), str);
	
    refresh();
    row++;
	
    signal(SIGINT, should_i_stop);

}

The message is printed in the next line. But every time a new message comes it prints only it and erases all the previous ones.
How to over come this?
How can I only update the new message keeping the previous messages unerased?

Regards,
Spatika

ANN: Unit testing framework cfix 1.4 released

Wed, 24 Jun 2009 02:47:25 -0700

Hi,

a new version of cfix, the open source unit testing framework for
user and kernel mode C and C++, has been released. cfix 1.4, in addition to the existing feature of allowing test runs to be restricted to specific fixtures, now also allows single testcases to be run in isolation, which can be a great aid in debugging. Besides other minor fixes, the cfix API has been slightly enhanced and cfix now degrades more gracefully in case of dbghelp-issues.

Updated cfix binaries and source code are available on:
http://www.cfix-testing.org/

As a major step forward, *cfix studio* has now entered public beta. cfix studio, built on top of cfix 1.4, is an *AddIn for Visual Studio
2005/2008* that adds C/C++ unit testing capabilities to the IDE --
including debugger integration, appropriate tool windows and built-in
support for dealing with multiple architectures (32/64 bit).

Check out the free beta release on
http://www.cfix-studio.com/unit-testing-framework/download.html

Tutorials are available here:
http://www.cfix-studio.com/visual-studio-addin/doc/TutorialUserVsCc.html
http://www.cfix-testing.org/doc/TutorialUserVsCc.html (User C++)
http://www.cfix-testing.org/doc/TutorialUserVs.html (User C)
http://www.cfix-testing.org/doc/TutorialKernelWdk.html (Kernel C)

As always, all kind of feedback is welcome!

--JP

create a new ATL project with exsisting IDL

Tue, 23 Jun 2009 02:13:33 -0700

I have one existing idl file(Add.idl) where the interface and the library is look like the following

interface IAdd:IDispatch
{
[id(1), AddNumber("Add two number")]
}
library ADDLib
{
importlib("stdole32.tlb");
importlib("stdole2.tlb");

[
uuid(339171FF-A6E7-433F-A314-FF740F53FE56),
helpstring("Add Class")
]
coclass Add {
[default] interface IAdd;
};
};
Now I need to create one new ATL project which will import this file(Add.idl) and my interface will be derived from IAdd interface.
Then I will have to implement the AddNumber() method described in IAdd interface along with some new methods that will be present
in the newly implemented interface.
So,after implementation my idl file should look like this

import "Add.idl";
interface Isample:IAdd
{
};

Can any one tell me the steps how to implement this in VS2008.
I am very new to this , please help me..

Voice Enabled Home Automation

Mon, 22 Jun 2009 06:33:23 -0700

Dear all Expert,

I am a Electrical student working on a project of Voice Enabled Home Automation. As this is a school project, my professor therefore disallow me to use any existing software/hardware readily available in the market for Home Automation.

I therefore had to start everything from scrape. Regarding the Hardware side, i will use a RF600D/E chip to control the Home applicances (e.g. lighting switch, power point, curtain drawer)

As for the software side, I therefore need the help of your expertist. I need to write a C++ program using Microsoft Speech SDK 5.1 to control my RF chipset preferably using the computer Parallel port (no other circuit needed to interface to my RF chipset).

E.g. When i voice out "Turn On Living Room Light", Parallel port pin 1 will turn on and off (Just a 50ms to 100ms of on time will do). The parallel port will be connected to my RF chipset input control which will in turns control my RF switch at remote end.

I am seeking for help to start the source code writing for my program as i had limited knowledge to software programming. Does anyone has source code written for Voice control using SDK 5.1 that control the parallel port? Can anyone pls provide me a sample code to start with? Thanks a lot for anyone help. Have a nice day ahead.

What's wrong with this program?

Mon, 22 Jun 2009 05:58:20 -0700

It has to check if a sequence is accepted by pushdown automata:

#include <stdio.h>
#include <string.h>
#include <conio.h>
#include <alloc.h>
#include <ctype.h>
typedef struct
{
char st; // starea in care trece automatul
char *sir; // sirul de simboluri cu care se inlocuieste
// simbolul din varful stivei
} tip_delta; // o vom numi varianta

tip_delta *delta[15][10][10]; // functia de tranzitie
// deoarece automatul push down este nedeterminist fiecare // element al tabloului delta este o adresa la care se vor // memora dinamic variantele posibile

char Q[15]; // multimea starilor automatului
char S[10]; // multimea simbolurilor alfabetului de intrare
char Z[10]; // multimea simbolurilor alfabetului stivei
char F[15]; // multimea starilor finale ale automatului;
// este folosita doar daca criteriul de acceptare
// este cel al starii finale
char secv[50]; // secventa citita de pe banda de intrare
char crt; // criteriul de acceptare
// crt='v' ( stiva vida)
// crt='f' ( stare finala)
char stiva[50]; // memoria stiva

int este(char x,char M[])
{
// returneaza pozitia simbolului x in multimea M,
// sau 1 daca x nu apartine lui M
int i;
for(i=0;M[i];i++)
if(M[i]==x) return i;
return( 1);
}

void citeste(char M[],char x)
{
char *mesaj;
switch(x)
{
case 's':
mesaj="simbolurilor alfabetului de intrare";
break;
case 'q':
mesaj="starilor (prima stare este starea initiala)\n";
break;
case 'f':
mesaj="starilor finale";
break;
case 'p':
mesaj="simbolurilor alfabetului memoriei stiva:";
strcat(mesaj,"\n(primul simbol este simbolul initial al stivei)");
}
printf("\nDati multimea %s: ", mesaj);
gets(M);
}

void citdelta()
{ int i,j,k,l;
tip_delta *pd;
char sir1[50],*s,*s1;
printf("\n exemplu pentru furnizarea functiei delta\n");
printf(" delta[p,0,Z]=(p,&),(q,AA),(p,AZ) \n\n");
for(i=0;Q[i];i++)
for(j=0;S[j];j++)
for(k=0;Z[k];k++)
{
printf("\n delta[%c,%c,%c]=",Q[i],S[j],Z[k]);
fflush(stdin);
gets(sir1);
if(strlen(sir1)==0)
// nu e definita functia pentru tripletul Q[i],S[j],Z[k]
{delta[i][j][k]=NULL; continue;}
s=sir1;
l=0;
// se numara variantele citite si se aloca dinamic
// zona necesara pentru memorarea lor; ultima varianta
// introdusa va fi o varianta fictiva care va contine
// componenta sir=NULL si este utilizata pentru a
// depista sfarsitul variantelor
while(s=strchr(s,'('))
{l++;s++;}
pd=delta[i][j][k]=
(tip_delta *)malloc((l+1)*sizeof(tip_delta));
s=sir1;
while(s=strchr(s,'('))
{
pd >st=*(s+1);
s1=s+3;
s=strchr(s1,')');
*s='\0';
pd >sir=(char *)malloc(strlen(s1)+1);
strcpy(pd >sir,s1);
s=s+1;
pd++;
}
pd >sir=NULL; // completarea variantei fictive
}
}

int push(char *x,int vs)
{
// inlocuieste simbolul din varful stivei cu sirul
// de caractere de la adresa x
// se actualizeaza varful stivei : vs
char *p;
vs ;
if(*x!='&')
{
for(p=x;*p;p++);
for(p ;p>=x;p ) stiva[vs++]=*p;
}
return vs;
}

int accept(char q,int i,int vs)
{
// functia returneaza valoarea 1 daca secventa este
// acceptata de automat si 1 in caz contrar
// se modeleaza metoda backtracking recursiv pentru
// gasirea solutiei
char simb[2];
int j,n,vf,k,l,m;
tip_delta *p;
n=0;
if(crt=='v') // criteriul stivei vide
{if(secv[i]=='\0')
if(vs==0) return(1);
else n=1;
}
else // criteriul starii finale
{if(secv[i]=='\0')
if(este(q,F)!= 1) return(1);
else n=1;
}
simb[0]=secv[i];
simb[1]='&';
vf=vs;
for(j=n;j<2;j++)
{
// se incearca cele doua posibilitati:
// daca simb[j]=secv[i] se incearca avansarea pe banda
// de intrare cu simbolul secv[i]
// daca simb[j]='&' se incearca o epsilon tranzitie
if((k=este(q,Q))== 1)break;
if((l=este(simb[j],S))== 1) {j++;continue;}
if(vf<1) break;
if((m=este(stiva[vf 1],Z))== 1) break;
p=delta[k][l][m];
for(;p && p >sir;p++) // se parcurg toate variantele
{
vs=vf;
vs=push(p >sir,vs);
if(accept(p >st,i+1 j,vs)!= 1) return(1);
}
}
return( 1);
}

void main(void)
{
int ind,i,j,k;
int vs; // virf stiva ( vs=0 indica stiva vida )
char q;
clrscr();
printf(" Simularea functionarii unui automat push down\ nedeterminist");
citeste(Q,'q'); // citire stari automat
citeste(S,'s'); // citire alfabet de intrare
strcat(S,"&"); // se adauga la alfabetul de intrare
// epsilon simbolizat prin &
citeste(Z,'p'); // citire alfabet memorie stiva
printf("\n Dati criteriul de acceptare\n");
printf(" stiva vida(v) ,stare finala (f) :");
if((crt=tolower(getche()))=='f')
citeste(F,'f'); // citire stari finale
printf(" \n\n Functia de tranzitie delta:");
printf("\n (simbolul & reprezinta epsilon)");
printf("\n (daca delta nu e definita pentru un triplet\ tastati ENTER)\n");
citdelta();
printf("\n\n Doriti sa verificati secventa?(d/n):");
while(tolower(getche())!='n')
{
printf("\n Dati secventa (pt secventa vida dati ENTER):\n");
gets(secv); // citirea secventei de pe banda de intrare
stiva[0]=Z[0]; // initializarea stivei cu simbolul
// initial al stivei
vs=1; // arata pozitia pe care se poate adauga un nou
// element in stiva; vs=0 indica stiva vida
// elementul din varful stivei este stiva[vs 1]
if(accept(Q[0],0,vs)!= 1)
printf("\n secventa este acceptata");
else
printf("\n secventa nu este acceptata");
printf("\n\n Doriti sa verificati secventa?(d/n):");
}
}

PushDown Automata(PDA) source code?

Mon, 22 Jun 2009 05:15:09 -0700

Does anyone have a Pushdown automata source code, or algorithm? or do you know where i can find it?
Thanks.

Free C/C++ eBooks download for you

Sun, 21 Jun 2009 19:13:33 -0700

Here you can free download Free C/C++ eBooks
http://ebookhouse.org/category/programming/cc/

Reverse string

Sun, 21 Jun 2009 05:23:07 -0700

hai all,

may any one know how to find the length of the string without using strlen functions and temporary variable.........

Rewriteing VB program in C - Serial port handling

Sat, 20 Jun 2009 05:12:35 -0700

Hi!

I built this PC thermometer: http://www.riccibitti.com/pc_therm.htm
It works fine with it's windows application, but I want to write an app for Linux in C based on the original VB code. Here's my work, and the original VB code. Plz someone chek my C program, and tell me if he/she found any difference betweenthe two app.

Thanks

Dijkstra Algorithm

Fri, 19 Jun 2009 04:49:34 -0700

hi
i have a question how i can know the second shortest path by dijkstra algorithm

Calculating Entropy of a file and coding it using Hamming

Fri, 19 Jun 2009 02:51:51 -0700

Hello there!

I am trying to solve a problem for a project i took and i am in the final

part of it...(view below for my until now code)

Well the aim is to calculate the entropy of a file and then to use

Hamming to code it. I managed to make both parts based on what I learned

from the class and read in the book. (Please if you are familiar with the

object tell me if it is correct )

So, my problem is that I am not able to merge those two parts below (you

dont need to read the theory for it).. like finding the entropy and then

continue for the coding of that file.

Any help, advice, anything is appreciate.
Thank you!

Entropy Calculation

#include "BufferedNode.h"
#include "Buffer.h"
#include "Vector.h"
#include <strstream>
#include <math.h>

#ifdef HAVE_VALUES_H
#include <values.h>
#endif

#ifdef HAVE_FLOAT_H
#include <float.h>
#endif

class Entropy;

DECLARE_NODE(Entropy)
/*Node
 *
 * @name Entropy
 * @category DSP:Misc
 * @description Calculates the entropy of a vector
 *
 * @input_name INPUT
 * @input_type Vector<float>
 * @input_description Input vector
 *
 * @output_name OUTPUT
 * @output_type Vector<float>
 * @output_description Entropy value (vector of 1)
 *
END*/


class Entropy : public BufferedNode {
   
   int inputID;
   int outputID;

public:
   Entropy(string nodeName, ParameterSet params)
      : BufferedNode(nodeName, params)

   {
      inputID = addInput("INPUT");
      outputID = addOutput("OUTPUT");
   }

   void calculate(int output_id, int count, Buffer &out)
   {
      ObjectRef inputValue = getInput(inputID, count);

      const Vector<float> &in = object_cast<Vector<float> > (inputValue);
      int inputLength = in.size();

      Vector<float> &output = *Vector<float>::alloc(1);
      out[count] = &output;

      float s2=0;
      float entr=0;
      for (int i=0;i<inputLength;i++)
      {
         s2+=in[i]*in[i];
      }
      s2 = 1/s2;

      for (int i=0;i<inputLength;i++)
      {
	 if (in[i] != 0)
	    entr -= s2*in[i]*in[i] * log(s2*in[i]*in[i]);
      }
      //cout << entr << endl;
      output[0] = entr;
   }

};

Hamming coding:

#include<iostream.h>   
#include<math.h>   
void hanming()   
{   
int i,n,k=2;   
int h[20];   
for(i=0;i<20;i++)h[i]=0;   
cout<<"bla bla"<<endl; cin="">>n;   
while(pow(2,k)<n+k+1)k++; cout=""><<"bla bla"<<endl; for(i="1;i<=n+k;i++){" if(i!="1&&i!=2&&i!=4&&i!=8)cin">>h[i];   
}   
h[1]=(h[3]+h[5]+h[7]+h[9]+h[11]+h[13]+h[15])%2;   
h[2]=(h[3]+h[6]+h[7]+h[10]+h[11]+h[14]+h[15])%2;   
h[4]=(h[5]+h[6]+h[7]+h[12]+h[13]+h[14]+h[15])%2;   
h[8]=(h[9]+h[10]+h[11]+h[12]+h[13]+h[14]+h[15])%2;   
for(i=1;i<=n+k;i++)cout<<h[i]; jiaoyan(int="" a[],int="" n)="" {="" i,p1,p2,p4,p8,m;="" int="" h[20];="" for(i="0;i<n;i++)h

[i+1]=a[i];" k="2;" p1="(h[1]+h[3])%2;" p2="(h[2]+h[3])%2;" m="2*p2+p1;" return="" m;="" }="" if(n="=3){">=5&&n<=7){   
// k=3;   
p1=(h[1]+h[3]+h[5]+h[7])%2;   
p2=(h[2]+h[3]+h[6]+h[7])%2;   
p4=(h[4]+h[5]+h[6]+h[7])%2;   
m=4*p4+2*p2+p1;   
return m;   
}   
if(n>=9&&n<=15){   
//k=4;   
p1=(h[1]+h[3]+h[5]+h[7]+h[9]+h[11]+h[13]+h[15])%2;   
p2=(h[2]+h[3]+h[6]+h[7]+h[10]+h[11]+h[14]+h[15])%2
;   
p4=(h[4]+h[5]+h[6]+h[7]+h[12]+h[13]+h[14]+h[15])%2
;   
p8=(h[8]+h[9]+h[10]+h[11]+h[12]+h[13]+h[14]+h[15])
%2;   
m=8*p8+4*p4+2*p2+p1;   
return m;   
}   
else{   
cout<<"bla bla"<<endl; return="" -1;="" }="" ����="" void="" main()="" {="" hanming();="" coco;="" int="" i,n,m,h[20];="" 

cout=""><<endl; cout=""><<"bla bla"<<endl; cin="">>n;   
cout<<"bla bla"<<endl; for(i="0;i<n;i++)cin">>h[i];   
m=jiaoyan(h,n);   
if(m==0)cout<<"bla bla"<<endl; if(m!="0)cout<<"bla bla"<<m;" cout=""><<endl; cin="">>coco;   
}

How to put video on iPod/iPhone/PSP/Zune/Zen/Sansa Fuze……

Fri, 19 Jun 2009 02:11:59 -0700

This guide is shared to help people put any video on their portable devices.

Most devices only accept the following commen video formats:
iPod/iPhone: H.264 (up to 320*240, 768kbps, 30fps), MPEG-4 (up to 480*480, 2500kbps, 30fps).
Zune: WMV, MPEG-4, H.264(30fps).
Creative Zen: AVI.
Sansa: MPEG-4, MP4.

In order to put some unusual video on your portable devices you need a professional Video Converter

4Easysoft Total video converter can convert video between almost all video formats.
Input Video Formats: WMV, MP4, MOV, M4V, AVI, FLV, 3GP, 3G2, MPG, VOB, MPEG, MPG, ASF, MOD, MKV,RM,TOD, MPV, TS.
Output video formats:MP4, MOV, M4V, VOB, XviD, AVI, FLV, 3GP, 3G2, MPG, ASF, MKV, RM. H.264.MPEG-4, WMV.
So, with this powerful software can be used as VOB Converter, Palm Video Converter, 3GP Video Converter, Quicktime Video Converter, etc.

The following is about how to use video converter to convert almost any video formats to most portable devices supported video.
Step 0: Download and install 4Easysoft Total Video Converter
Step 1: Run it and click the “Add File” button to load your video.
Step 2: Select the output video format from the profile drop-download list.
The profile including video for almost any portable devices such as iPod, iPhone, Archos, iRiver, PSP, Zune. Creative Zen, Nokia Serials, Palm, and so on.

Step 3:Edit your video.
You can use the powerful editing function to edit your video.
Trim: You can use this function to cut any clip of your video.
Click the “Trim” and a dialogue-box pops up. You can drag the slide-bar to the position you want.
You can also set the Start time and the End time to trim your video.

Crop: You can remove the black edges around your movie video and customize the size of video play region as you wish. Click “Crop” to open the Trim window. Select a crop mode in the Crop Mode drop-down list and click OK to save the crop.

Preferences: By clicking the “Preference” button you can select the output destination, the Snapshot foler, the format of the snapshot image. You can also choose to shut down your computer or do nothing after your conversion. You can also select the CPU usage.

Merge: You can use this function to merge several videos into one.
Snapshot: You can use this function to capture your favorite image.

Step 4: Click the “Start” button to start your conversion and in a short while it will be finished.

C++ reading line problem file

Tue, 16 Jun 2009 22:35:32 -0700

hi plz help. Trying since 1 week.

acwl1 line we
james line rx
sijith fff xw
nisha nnn w
/sijith line r
/Arjun line w
vineeth line r
acls2 faculty x
arrr line2 w
Rahul line3 wx
Arjun line1 m
/Tom line wr
ac01l2 lineN w
aclM1 line1 rw
Ram line3 x
acalM line2 rx
acblM line3
/jaffer line m
Ram line3 x

Here the line starting with / is command and others is arguments.
if any commands last word matches any letters of arguments last word it have to
print that argument(have to print only the first matching).
if one command preceeds other command then it have to check the same argumnets list above
Here "Arjun line w" matches "sijith fff xw" so it have to output that argument(not nisha nnn w)

eg:
" /sijith line r " matches "james line rx"

we have to output james line rw

if any command preceeds argument then it have to continue upto next command and check
the matching arguments inbetween two commands
eg:
Here /Arjun is preceeds by argument "vineeth line r" so continue upto command "/Tom line wr" and
check argument between Arjun and Tom and prints arrr line2 w

Every time have to check arguments inbetween commands

Using fstream.get in UNICODE...

Mon, 15 Jun 2009 21:10:32 -0700

Alright, I simply want verification that I am attempting to read in a string properly. You see, I am writing an object that will read in binary data that was written by an old ANSI program in DOS. The object compiles with no warnings or errors, but I may not be doing this correctly. This object is UNICODE and as such, uses "wchar_t" instead of "char". The old program wrote in a 14-character array followed by an integer value. Using UNICODE, I can easily read in the integer value, but reading in a "char" as "wchar_t" has me a tad confused.

char pBuffer[14];

//Attempt to read each directory structure
this->fsFile.seekg(iSeek, ios::end);
for(short sLoop = 0; sLoop < this->Header.sDirCount; sLoop++)
{
  this->fsFile.get((wchar_t*)pBuffer, 14);
  this->fsFile.get((wchar_t*)&(this->pStringDir[sLoop].iSize), 4);

  //Convert the old ANSI string to UNICODE
  mbstowcs(this->pStringDir[sLoop].pName, pBuffer, 14);
}

Does the first "fstream.get()" line read in 14 bytes, or 14 wchar_t, which is two or four times larger than an old char? As you can see, I simply read it in as it was meant to be read, then convert it to UNICODE for the object to use. Thanks for the help!

*EDIT*

Is it possible to detect an error when using "fstream.get" like it is using "fread" in C? Forgot to ask that as well. I'm not sure how to detect errors using fstream.

-Sephiroth