编程计算任意三角形的面积

面积area的算法:
area=√s(s-a)(s-b)(s-c)×s=(a+b+c)/2


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

float S(float a, float b, float c)
{
    float s = (a + b + c) / 2;
    return sqrt(s * (s - a) * (s - b) * (s - c));
}

void main()
{
    printf("%.2f", S(3, 4, 5));
}