题解 | 三角形判断

#include <stdio.h>

int main() {
    float a,b,c;
    while(scanf("%f %f %f\n",&a,&b,&c)!=EOF)
    {
        if((a + b) > c && (a + c) > b && (c + b) > a)
    {
        if(a == b &&  b== c)
        {
            printf("Equilateral triangle!\n");
        }
        else if(((a == b) && (a!=c)) ||((a == c) && (b!=c)) ||((c == b) && (a!=c)) )
        {
            printf("Isosceles triangle!\n");
        }
        else
        {
            printf("Ordinary triangle!");
        }
    }
        else
        {
            printf("Not a triangle!\n");
        }
    }

    return 0;
}