题解 | 三角形判断

#include <stdio.h>

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