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#include<stdio.h>
#include<math.h>
void check_traingle(int side)
{
int a, b, c;
printf("请输入三角形的三边长:");
scanf("%d,%d,%d", &a, &b, &c);
if (a + b <= c)
printf("不能构成三角形");
else if (a + b > c)//a*a + b*b - c*c=0？
printf("Triangle is valid");
else if (a + c > b)
printf("Triangle is valid");
else if (b + c > a)
printf("Triangle is valid");
printf("\n");
return;
}
