Learn C !!

Do you need to find out area of circles,In a click??Do it With C programing.
To do this you need to download a c compiler[I used Codeblocks.It's a free software and you can download it by these Links--

CodeBlock 8.02 for Windows [10.8Mb]
Codeblocks-8.02mingw for windows [19.3Mb]
Codeblocks_8.02-0ubuntu1.deb.tar.gz(for linux 32 bit)[20.1Mb]
Codeblocks-8.02-amd64.tar.gz(for linux 64bit[20.3Mb]
Codeblocks-8.02-mac.zip for Mac[19.6Mb]

Download Codeblocks using any of the links suites for you,install it to your hard drive;click on "New">Empty project and write down these codes;

#include <stdio.h> #include <conio.h> #include <ctype.h> void main() { float area, radius, pi; char ch; pi = 3.14159; printf(“\n Do you want to calculate area of a circle? (y/n) :”); ch = getch(); ch = toupper(ch); while( ch != ‘N’) { printf(“\n What is the Radius of your circle?: “); scanf(“%f”, &radius); area = pi * radius * radius; printf(“\n\n Area of This circle is: %.2f.”, area); printf(\n\n\n Do you want to calculate area of a circle? (y/n :”); ch = getch(); ch = toupper (ch); } }