Thread: Help with error

This program runs, but all of the values are coming out as 0.0.

Write a program that ask the user for the radius of a circle as a float value and prints a table with the circle’s diameter, its circumference and its area. Use a const float to represent a value for PI that is equal to 3.14159.

Code:

#include <stdio.h>
#include <stdlib.h>

int main ()
{
    float pi=3.14, area=0, circumference=0, diameter=0, radius=0, m=0;
    printf("Enter the raidus of a circle:\n");
    scanf("%f", &radius);
    radius = m;
    do
    {
           area=pi*m*m;
           circumference=2*(pi*m);
           diameter=2*m;
    }
    while (m!=0);
    
    printf("%f is the Area \n",area);
    printf("%f is the Circumference \n",circumference);
    printf("%f is the Diameter \n",diameter);
    
    system("pause");
    return 0;

Better yet, why not ditch the m variable and just do your calculations with radius? It will help you avoid silly errors like this, and make your code more readable.

you have defined m=0 and then assigned radius=m which is actually =0 so your radius bcomes 0 and hence the error.

moreover as the problem tells you u shuld have defined pi as const float and not float