C++ 代码

#include <iostream>
using namespace std;
int main()
{
    float a, b, c;
    cin >> a >> b >> c;
    if (a < c) swap(a, c);
    if (a < b) swap(a, b);
    if (b < c) swap(b, c);
    if (a >= b + c) cout<<"NAO FORMA TRIANGULO";
    else{
        if(a * a == b * b + c * c) cout<<"TRIANGULO RETANGULO"<<endl;
        if(a * a > b * b + c * c) cout<<"TRIANGULO OBTUSANGULO"<<endl;
        if(a * a < b * b + c * c) cout<<"TRIANGULO ACUTANGULO"<<endl;
        if(a == c) cout<<"TRIANGULO EQUILATERO"<<endl;
        else if(a==b || b==c) cout<<"TRIANGULO ISOSCELES";
    }
    return 0;
}