题解 | #三角形判断#

#define _CRT_SECURE_NO_WARNINGS
#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 + c <= b || b + c <= a) {
            printf("Not a triangle!\n");
        } else if (a == b && a == c) {
            printf("Equilateral triangle!\n");
        } else if (a == b || a == c || b == c) {
            printf("Isosceles triangle!\n");
        } else {
            printf("Ordinary triangle!\n");
        }
    }
    return 0;
}