Answer to Question #308218 in C for ahmed

Question

Write a program that reads the radius of a circle and calculates the area and circumference then prints the results.

Answer 1

#include <stdio.h>
#define PI 3.1415926

int main() {
    double r, area, circum;

    printf("Enter the radius of the circle: ");
    scanf("%lf", &r);

    area = PI * r * r;
    circum = 2 * PI * r;
    printf("The area of the circle is %.3lf\n", area);
    printf("The circumference of the circle is %.3lf\n", circum);

    return 0;
}