题解 | #三角形判断#

#include <stdio.h>

int main() {
    int a = 0, b = 0, c = 0;
    while (scanf("%d%d%d", &a,&b,&c) != EOF) {
        if ((a == b &&(c!=a)&&(a+b>c))||((a==c&&(c!=b)&&(a+c>b))||((b==c&&(c!=a)&&(b+c>a))))) {
            printf("Isosceles triangle!\n");
        }
        else if (a == b && b == c ) {
            printf("Equilateral triangle!\n");
        }
        else if ((a + b > c) &&(a + c != b)) {

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