View Code of Problem 24

#include<stdio.h>
#include<math.h>
int main()
{
    int a,b,c;
    float area,sum;
    printf("请输入三角形三边的长。\n");
    scanf("%d%d%d",&a,&b,&c);
    sum=(a+b+c)/2;
    area=sqrt(sum*(sum-a)*(sum-b)*(sum-c));
    printf("%6.2f",area);
    return 0;
}