```cpp
#include <stdio.h>
int main()
{
int a, b, c;
scanf("%d %d %d", &a, &b, &c);
if (a + b <= c || a + c <= b || b + c < =a)
printf("Not triangle\n");
else
{
if (a * a + b * b == c * c || b * b + c * c == a * a || a * a + c * c == b * b)
printf("Right triangle\n");
if (a * a + b * b > c * c && b * b + c * c > a * a && a * a + c * c > b * b)
printf("Acute triangle\n");
if (a * a + b * b < c * c || b * b + c * c < a * a || a * a + c * c < b * b)
printf("Obtuse triangle\n");
if ((a == b)||( b == c) ||( c == a))
printf("Isosceles triangle\n");
if (a == b&&b == c)
printf("Equilateral triangle\n");
}
return 0;
}
```
by sdyzpf @ 2023-10-17 19:13:08
@[sdyzpf](/user/174477) 注意看样例一，等边三角形也算等腰三角形的一种。
by sdyzpf @ 2023-10-17 19:13:39