题解 | #三角形判断#

#include <stdio.h>
int main()
{
    int a = 0, b = 0, c = 0;

    while (scanf("%d %d %d", &a, &b, &c) != EOF)      //多组输入
    {
        if (((a + b) > c) && ((a - b) < c))
        {
            if (a == b && b == c)
            {
                printf("Equilateral triangle!\n");
            }
            else if ((a == b && b != c) || (a == c && c != b) || (b == c && c != a))
            {
                printf("Isosceles triangle!\n");
            }
            else
                printf("Ordinary triangle!\n");
        }
        else
        {
            printf("Not a triangle!\n");
        }
    }
    return 0;
}