题解 | #三角形判断#

#include <stdio.h>

int main() {
    int a, b,c;
    while (scanf("%d %d %d", &a, &b,&c) != EOF) { // 注意 while 处理多个 case
        // 64 位输出请用 printf("%lld") to 
        if((a+b>c)&&(a+c>b)&&(b+c>a)){
            if ((a==b)||(a==c)||(b==c)) {

                if ((a==b)&&(a==c)) {
                    printf("Equilateral triangle!\n");
                    continue;
                }
                printf("Isosceles triangle!\n");
                continue;
                
            
            }
            printf("Ordinary triangle!\n");
            continue;

        }
        else {
            printf("Not a triangle!\n");
            continue;
        
        }
    }
    return 0;
}