题解 | #三角形判断#

#include <stdio.h>

int main() {
    int a, b, c = 0;
    while (scanf("%d %d %d", &a, &b, &c) != EOF) 
    {
       if(b + c > a && b + a > c && a + c >b)
       {
        if (a == b && b == c && c == a) 
        {
            printf("Equilateral triangle!\n");
        } 
        else if (a == b && b!= c || a !=b && b == c || a == c && c != b) 
        {
            printf("Isosceles triangle!\n");
        }
        else 
        {
        printf("Ordinary triangle!\n");
        }
       }
       else//(b+c<=a)
       {
        printf("Not a triangle!\n");
       }
    }
    return 0;
}