C++第一次实验

<span style="font-family: Arial, Helvetica, sans-serif;">/*作者：吴红斌</span>

<span style="font-family: Arial, Helvetica, sans-serif;">日期：2016.3.2</span>

<span style="font-family: Arial, Helvetica, sans-serif;">教师：曾辉*/</span>

<span style="font-family: Arial, Helvetica, sans-serif;">#include<stdio.h></span>

#include<math.h>void main(){int a,b,c;double p, s;scanf("%d%d%d",&a,&b,&c);if(a+b<=c||a+c<=b||b+c<=a)printf("不是三角形！\n");else{p=(a+b+c)/2.0;s=sqrt(p*(p-a)*(p-b)*(p-c));printf("%lf\n",s);}}