判断三角形的类型

#include<stdio.h>
#include<stdlib.h>

int main(void)
{
    int a;
    int b;
    int c;

    printf("please input a:");
    scanf("%d", &a);

    printf("please input b:");
    scanf("%d", &b);

    printf("please input c:");
    scanf("%d", &c);
    
    int flag = (a*a + b*b > c*c) && (a*a + c*c > b*b) && (b*b + c*c > a*a);
    if(flag)
    {
        if( (a == b) && (a == c) && (b == c))
        {
            printf("等边三角形\n");
        }
        else if((a == b) || (a == c) || (b == c))
        {
            printf("等腰三角形\n");
        }
        else
        {
            printf("普通三角形\n");
        }
    }
    else
    {
        printf("不能构成三角形\n");    
    }

    return EXIT_SUCCESS;
}