题解 | #三角形判断#

#include <stdio.h>

int main() {
    int a = 0, b = 0, c = 0;

    while (3 == scanf("%d %d %d", &a, &b, &c)) {
        if (a + b > c && a + c > b && b + c > a) {
            if (a == b && b == c) {
                printf("Equilateral triangle!");
            } else if (a == b || b == c || a == c) {
                printf("Isosceles triangle!");
            } else {
                printf("Ordinary triangle!");
            }
        } else {
            printf("Not a triangle!");
        }
        printf("\n");
    }

    return 0;
}