#include<bits/stdc++.h>
using namespace std;
int a[5];
int main()
{
	for (int i=1;i<=3;i++)
		cin>>a[i];
	sort(a+1,a+3+1);
	if(a[1]+a[2]>a[3] && a[1]+a[3]>a[2] & a[3]+a[2]>a[1])
	{
		if(a[1]*a[1]+a[2]*a[2]>a[3]*a[3]) 
			cout<<"Right triangle"<<"\n";
		if(a[1]*a[1]+a[2]*a[2]==a[3]*a[3]) 
			cout<<"Acute triangle"<<"\n";
		if(a[1]*a[1]+a[2]*a[2]<a[3]*a[3]) 
			cout<<"Obtuse triangle"<<"\n";
		if(a[1]==a[2] && a[1]!=a[3] || a[2]==a[3] && a[2]!=a[1] || a[1]==a[3] && a[2]!= a[3]) 
			cout<<"Isosceles triangle"<<"\n";
		if(a[1]==a[2] && a[2]==a[3]) 
			cout<<"Equilateral triangle"<<"\n";
	}
	else
		cout<<"Not triangle"<<"\n";
	return 0;
}

代码有点恶心，抱歉，请慢慢看。 人家都是数据2,4错，我是2,4对，其他都错。 求助