题解 | #三角形判断#

int main()
{
    int a,b,c;
    while(scanf("%d %d %d",&a,&b,&c) != EOF)
    {
        getchar();
        if(a + b > c && a + c > b && c + b > a)         //是否是三角形
        {
            if(a == b && b == c)                       //等边
            { 
                printf("Equilateral triangle!\n");
            }
            else if(a == b || b == c || a == c)       //等腰
            {
                printf("Isosceles triangle!\n");
            }
            else
            {
                printf("Ordinary triangle!\n");
            }
        }
        else
        {
            printf("Not a triangle!\n");
        }
    }
    return 0;
}