/***********************************************************/
/* CALCULATOR PROGRAM DEVELOPED BY A.KEERTHIVASAN */
/* B.Tech INDUSTRIAL BIOTECHNOLOGY */
/* ANNA UNIVERSITY */
/* [[Email Removed]] */
/***********************************************************/
#include<stdio.h>
#include<conio.h>
#include<math.h>
long int a,b,fac;int choice,option,n,r;
float result,f;
double g,res;
int op;
main()
{
clrscr();
printf("\t\t\t\tCALCULATOR\n\n\n\t\tprogram developed by A.keerthivasan\n");
printf("OPERATIONS:\nenter a choice[1-10]\n");
printf("1.ADDITION\n");
printf("2.SUBTRACTION\n");
printf("3.MULTIPLICATION\n");
printf("4.DIVISION\n");
printf("5.TRIGONOMETRIC\n");
printf("6.LOGARITHMIC\n");
printf("7.SQUARE&SQUARE ROOTS\n");
printf("8.CUBES\n");
printf("9.FACTORIAL\n");
printf("10.EXIT\n");
printf("Enter a choice :");scanf("%d",&choice);
switch(choice)
{
case 1:
add();
break;
case 2:
sub();
break;
case 3:
mul();
break;
case 4:
div();
break;
case 5:
trig();
break;
case 6:
loga();
break;
case 7:
square();
break;
case 8:
cube();
break;
case 9:
fact();
break;
case 10:
exit();
break;
default:
printf("Please enter a valid choice");
break;
}
getch();
check();
}
getelement()
{
printf("\n\n\n\n\n\n\n\n\n\t\t\tEnter number 1:");scanf("%ld",&a);
printf("\t\t\tEnter number 2:");scanf("%ld",&b);
}
showresult()
{
clrscr();
printf("\n\n\n\n\n\n\n\n\n\t\t\t\aThe result is:%f\n",result);
getch();
}
check()
{
clrscr();
printf("\n\n\n\n\n\n\n\n\n\n\t\t\tWant to do another operation?\n\t\t\tpress 1 for yes any key for no\n");
scanf("%d",&op);
if(op==1)
{
main();
}
else
{
return;
}
return;
}
/* math function programs */
add()
{
clrscr();
getelement();
result=a+b;
showresult();
return;
}
sub()
{
clrscr();
getelement();
result=a-b;
showresult();
return;
}
mul()
{
clrscr();
getelement();
result=a*b;
showresult();
return;
}
div()
{
clrscr();
getelement();
g=a/b;
printf("\n\n\n\n\n\n\n\n\n\t\t\t\aThe result is:%lf",g);
return;
}
trig()
{
clrscr();
printf("Enter the angle in degrees\n");scanf("%f",&f);
g=(6.2856/360)*f;
printf("What trigonometric operation do you want to perform?\n");
printf("1.SINE\n2.COS\n3.TAN\n4.COSEC\n5.SEC\n6.COT\n7.EXIT\n");
printf("Enter an option[1-7]");scanf("%d",&option);
switch(option)
{
case 1:
clrscr();
res=sin(g);
printf("\n\n\n\n\n\n\n\n\n\t\t\tANSWER:%lf\n",res);
break;
case 2:
clrscr();
res=cos(g);
printf("\n\n\n\n\n\n\n\n\n\t\t\tANSWER:%lf\n",res);
break;
case 3:
res=tan(g);
clrscr();
printf("\n\n\n\n\n\n\n\n\n\t\t\tANSWER:%lf\n",res);
break;
case 4:
res=1/sin(g);
clrscr();
printf("\n\n\n\n\n\n\n\n\n\t\t\tANSWER:%lf\n",res);
break;
case 5:
res=1/cos(g);
clrscr();
printf("\n\n\n\n\n\n\n\n\n\t\t\tANSWER:%lf\n",res);
break;
case 6:
res=1/tan(g);
clrscr();
printf("\n\n\n\n\n\n\n\n\n\t\t\tANSWER:%lf\n",res);
break;
default:
clrscr();
printf("\n\n\n\n\n\n\n\n\n\t\t\tEnter a valid choice\n");
break;
}
}
loga()
{
float x,y;clrscr();
printf("What log function do you want to perform?\n");
printf("1.LOG\n2.NATURAL LOG (ln)\n3.ePOWx\n4.xPOWy\npress any other number to exit");
scanf("%d",&option);
switch(option)
{
case 1:
printf("Enter a:\n");scanf("%ld",&a);
res=log10(a);
printf("ANSWER:%lf\n",res);
break;
case 2:
printf("Enter a:\n");scanf("%ld",&a);
res=log(a);
printf("ANSWER:%lf\n",res);
break;
case 3:
printf("Enter a:\n");scanf("%ld",&a);
res=exp(a);
printf("ANSWER:%lf\n",res);
break;
case 4:
printf("Enter x:\n");scanf("%f",&x);
printf("Enter y:\n");scanf("%f",&y);
res=pow(x,y);
printf("ANSWER:%lf\n",res);
break;
default:
break;
}
}
square()
{
clrscr();
printf("What option do you want to perform?\n");
printf("1.SQUARE\n2.SQUAREROOT\n");
printf("Press any other key to exit");scanf("%d",&option);
switch(option)
{
case 1:
printf("\n\n\n\n\n\n\t\t\tEnter the number\n");scanf("%ld",&a);
result=a*a;
showresult();
break;
case 2:
printf("\n\n\n\n\n\n\t\t\tEnter the number\n");scanf("%ld",&a);
result=sqrt(a);
showresult();
break;
default:
break;
}
return;
}
cube()
{
clrscr();
printf("Enter the number\n");scanf("%ld",&a);
result=a*a*a;
showresult();
return;
}
fact()
{
int i,j;long int k;
clrscr();
printf("OPERATION:\n1.FACTORIAL\n2.PERMUTATION(nPr)\n3.COMBINATION(nCr)\n");
printf("What operation do you want to perform?\nEnter a choice[1-3]:");
scanf("%d",&option);printf("Enter the number:");scanf("%d",&n);
switch(option)
{
case 1:
facto(n);
printf("The factorial is:%ld",fac);
break;
case 2:
printf("Enter r value:\n");scanf("%d",&r);
k=facto(n)/facto(r);
printf("The nPr value is:%ld",k);
break;
case 3:
printf("Enter r value:\n");scanf("%d",&r);
k=facto(n)/(facto(n-r)*facto(r));
printf("The nCr value is:%ld",k);
break;
default:
break;
}
}
int facto(int a)
{
int i,j;
fac=1;
for(i=a;i>=1;i--)
{
fac=(fac*i);
}
return fac;
}
