uva10195

不多说，给你三角形三边长，求内切圆半径，够简单吧？但是你肯定会wa的。因为边长有=0的情况。悲剧啊。。。。

 

代码：

#include <iostream>#include <cstdio>#include <cstdlib>#include <cmath>using namespace std;int main(){double a, b, c;while (scanf("%lf %lf %lf", &a, &b, &c) != EOF){if(0==a || 0==b || 0==c){printf("The radius of the round table is: 0.000\n");continue;}printf("The radius of the round table is: %.3lf\n", a * b * sin(acos((a * a + b * b - c * c) / (2.0 * a * b))) / (a + b + c));}return 0;}