3-0.c

好东西,绝对是好东西,我向大家推荐

#include <stdio.h>
#include <math.h>
int main()
{
	int n,i,j;float a[80],t1,t2,t3,g1,g2,g3;
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		for(j=0;j<3*n;j++)
		{
			scanf("%f",&a[j]);
		}
	}	
	for(i=0;i<3*n;i=i+3)
	{		
		t1=fabs(a[i]-a[i+1]);
		t2=fabs(a[i+1]-a[i+2]);
		t3=fabs(a[i+2]-a[i]);
		g1=fabs(a[i]*a[i]+a[i+1]*a[i+1]-a[i+2]*a[i+2]);
		g2=fabs(a[i+1]*a[i+1]+a[i+2]*a[i+2]-a[i]*a[i]);
		g3=fabs(a[i+2]*a[i+2]+a[i]*a[i]-a[i+1]*a[i+1]);
		if((t1+0.001)>a[i+2])
		{printf("Can not form a triangle\n");}
		else if((t2+0.001)>a[i])
		{printf("Can not form a triangle\n");}
		else if((t3+0.001)>a[i+1])
		{printf("Can not form a triangle\n");}		
		else if(g1<0.001||g2<0.001||g3<0.001)		
		{printf("Can form a right triangle\n");}
		else
		{printf("Can form a triangle\n");}		
	}
	return(0);
}