#include
#include
using namespace std;
bool ikun(float a, float b, float c)
{
if ((a + b <= c) || (b + c <= a) || (a + c <= b))
{
cout << "可构成三角形" << endl;
return 1;
}
else
{
cout << "错误" << endl;
return 0;
}
}
float xiaoheizi(float a, float b, float c)
{
float p, float d, float D;
p = (a + b + c) / 2;
D = p * (p - a) * (p - b) * (p - c);
d = sqrt(D);
return d;
}
int main()
{
float a=0, b=0, c=0, p=0, d=0, D=0;
cin >> a, b, c;
cout << xiaoheizi(a, b, c);
return 0;
}
cin >> a, b, c;改成cin >> a>>b>>c;