搞不懂哪里出问题

#include<bits/stdc++.h>
using namespace std;
bool tri,rig,acu,obt,iso,equ;
int a[4];
int main() {
	for(int i=1; i<=3; i++)
		cin>>a[i];
	sort(a+1,a+4);
	if(a[1]*a[1]+a[2]*a[2]==a[3]*a[3]) rig=true;
	if(a[1]*a[1]+a[2]*a[2]>a[3]*a[3]) acu=true;
	if(a[1]*a[1]+a[2]*a[2]<a[3]*a[3]) obt=true;
	if(a[1]==a[2]) iso=true;
	if(a[1]==a[2]&&a[2]==a[3]) equ==true;
	if(a[1]+a[2]>=a[3]) tri=true;
	if(tri==false) {
		cout<<"Not triangle"<<endl;
		return 0;
	}
	if(rig==true) cout<<"Right triangle"<<endl;
	if(acu==true) cout<<"Acute triangle"<<endl;
	if(obt==true) cout<<"Obtuse triangle"<<endl;
	if(iso==true) cout<<"Isosceles triangle"<<endl;
	if(equ==true) cout<<"Equilateral triangle"<<endl;
	return 0;
}