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)  
	{
		//1.判断能否构成三角形
		if (a + b > c && a + c > b && b + c > a)  //判断能否构成三角形 其实条件是两条较短边之和大于第三条边，这里懒
		{
			//2.判断三角形类型
			if (a == b && a == 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;
}