It looks like you're new here. If you want to get involved, click one of these buttons!

- 141.6K All Categories
- 104.7K Programming Languages
- 6.4K Assembler Developer
- 1.9K Basic
- 39.8K C and C++
- 4.3K C#
- 7.9K Delphi and Kylix
- 4 Haskell
- 9.6K Java
- 4.1K Pascal
- 1.3K Perl
- 2K PHP
- 518 Python
- 37 Ruby
- 4.3K VB.NET
- 1.6K VBA
- 20.8K Visual Basic
- 2.6K Game programming
- 312 Console programming
- 89 DirectX Game dev
- 1 Minecraft
- 110 Newbie Game Programmers
- 2 Oculus Rift
- 8.9K Applications
- 1.8K Computer Graphics
- 730 Computer Hardware
- 3.4K Database & SQL
- 522 Electronics development
- 1.6K Matlab
- 628 Sound & Music
- 257 XML Development
- 3.3K Classifieds
- 196 Co-operative Projects
- 185 For sale
- 189 FreeLance Software City
- 1.9K Jobs Available
- 600 Jobs Wanted
- 201 Wanted
- 2.9K Microsoft .NET
- 1.7K ASP.NET
- 1.1K .NET General
- 3.3K Miscellaneous
- 4 Join the Team
- 0 User Profiles
- 353 Comments on this site
- 60 Computer Emulators
- 2.1K General programming
- 183 New programming languages
- 604 Off topic board
- 170 Mobile & Wireless
- 44 Android
- 124 Palm Pilot
- 335 Multimedia
- 151 Demo programming
- 184 MP3 programming
- 0 Bash scripts
- 19 Cloud Computing
- 53 FreeBSD
- 1.7K LINUX programming
- 367 MS-DOS
- 0 Shell scripting
- 320 Windows CE & Pocket PC
- 4.1K Windows programming
- 895 Software Development
- 408 Algorithms
- 68 Object Orientation
- 89 Project Management
- 90 Quality & Testing
- 239 Security
- 7.6K WEB-Development
- 1.8K Active Server Pages
- 61 AJAX
- 2 Bootstrap Themes
- 55 CGI Development
- 19 ColdFusion
- 222 Flash development
- 1.4K HTML & WEB-Design
- 1.4K Internet Development
- 2.2K JavaScript
- 34 JQuery
- 286 WEB Servers
- 151 WEB-Services / SOAP

sundog
Posts: **3**Member

Can someone help me to write a program to calculate the value of x for which f(x) = 0 zero for the general quadratic equation. Use the quadratic formula.

a.The program should have input boxes for a, b and c where a, b, and c are the coefficients of x2, x1 and x0

b.And out put the solutions for x.

c.if the solution contains the square root of a negative number then the program should print the message this equation has complex roots and out put the complex roots.

plz i'm really in need of help

a.The program should have input boxes for a, b and c where a, b, and c are the coefficients of x2, x1 and x0

b.And out put the solutions for x.

c.if the solution contains the square root of a negative number then the program should print the message this equation has complex roots and out put the complex roots.

plz i'm really in need of help

Terms of use / Privacy statement / Publisher: Lars Hagelin

Programmers Heaven articles / Programmers Heaven files / Programmers Heaven uploaded content / Programmers Heaven C Sharp ebook / Operated by CommunityHeaven LLC

© 1997-2015 Programmersheaven.com - All rights reserved.

## Comments

6,349Member:

: a.The program should have input boxes for a, b and c where a, b, and c are the coefficients of x2, x1 and x0

:

: b.And out put the solutions for x.

:

: c.if the solution contains the square root of a negative number then the program should print the message this equation has complex roots and out put the complex roots.

:

:

: plz i'm really in need of help

:

:

Place a couple of TLabels, TEdits and one TButton on the form. In the TButton.OnClick event code the following:

Use the StrToFloat() to convert the TEdit.Text property to doubles. This will give you the a, b, c coefficients as numbers, so you can calculate with them.

Then comes the maths part, just like you would do on paper. You might need an if-then-else-if-then-else statement to check the various answer possibilities:

[code]

if D < 0 then

begin

// Do something

end else if D = 0 then

begin

// Do something else

end else { no need for another if-then, because if the program gets

this far, D is not smaller or equal to 0, thus greater than 0 }

begin

// Third do something

end;

[/code]

Finally use FloatToStr() to convert the results back to strings to show them using another few TLabels.

Check out the help files for more info on these objects, functions.