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)
    {
        if(a + b > c && b + c > a && a + c > b)//判断是否为三角形
            {
                if(a == b && b == c)//判断是否为等边三角形
            {
                printf("Equilateral triangle!\n");
            }
            else if((a == b || b == c || a == c))//判断是否为等腰三角形
            {
                printf("Isosceles triangle!\n");
            }
            else
            {
                printf("Ordinary triangle!\n");
            }
        }
        else
        {
            printf("Not a triangle!\n");
        }
    }
    return 0;
}