Archive:Area of triangle using C

#include<stdio.h>
#include<math.h>

/* main: calculate the area of a triangle using Heron's Formula */
int main(void)
{
    float a, b, c, s, area;
    printf("Enter sides of triangle: ");
    scanf("%f%f%f", &a, &b, &c);
    s = (a + b + c) / 2;

    /* no error checking: sqrt() works only if its arg >= 0 */
    area = sqrt(s * (s-a) * (s-b) * (s-c));
    printf("Area = %f\n", area);

    /* indicate success */
    return 0;
}