给定三角形的三边长，求三角形的面积

#include <stdio.h>#include<math.h>int main(){    double a,b,c,s,area;    scanf("%d %d %d",&a,&b,&c);    s=(a+b+c)/2;    area=sqrt(s*(s-a)*(s-b)*(s-c));    printf("a=%f\tb=%f\tc=%f\n",a,b,c);    printf("area=%f\n",area);    return 0;}