Description

This example works out the area of a circle depending on what the user enters for the radius

Code

#include <stdio.h>

#define PI 3.14159

int main()
{
float sum , radius ;
printf("This program works out the area of a circle.\n");
printf("Enter the radius of the circle.\n");
scanf("%f",&radius);
/*area of a circle is pi * radius * radius*/
sum = PI * radius * radius;
/*display the area*/
printf("The area of a circle is %f.\n",sum);
return 0;
}

Information

tested using Visual C++ 6 and Windows XP

Download

circlearea.txt