@[wangjiaying20](/user/467057) 字写错了。
by ud2_ @ 2021-03-20 17:58:12
```c
if(a+b<=c || b+c<=a || c+a<=b){
cout<<"Not triangle"<<endl;
return 0;
}
if((a*a+b*b==c*c && a<c&&b<c)|| (b*b+c*c==a*a &&b<a&&c<a)|| (c*c+a*a==b*b&&c<b&&a<b)) cout<<"Right triangle"<<endl;
if((a*a+b*b>c*c && a<=c && b<=c)||(c*c+b*b>a*a && c<=a && b<=a) ||(a*a+c*c>b*b && a<=b && c<=b)) cout<<"Acute triangle"<<endl;
if((a*a+b*b<c*c && a<c && b<c)|| (b*b+c*c<a*a&& a>c && b<a) || (c*c+a*a<b*b&& a<b && c<b)) cout<<"Obtuse triangle"<<endl;
if(a==c || b==a || c==b) cout<<"Isosceles triangle"<<endl;
if(a==b&&b==c) cout<<"Equilateral triangle"<<endl;
```
by yekgg @ 2021-03-20 18:05:37
@[yekgg](/user/410287) 谢了
by wangjiaying20 @ 2021-03-21 16:50:12