Thread: Prime #'s question. "Floating point exception" error.

Started over, rewrote the majority of it using a dry-erase board. It works rather well now. Any thoughts, comments, suggestions, etc. are welcome and appreciated.

Code:

#include<stdio.h>
#include<limits.h>

int main()
{
short int yesno;
long long int i,j;
long long int x=3;
long long int y=LLONG_MAX;

FILE *fp;
fp = fopen("output","w+");
fprintf(fp,"1, 2, ");

for(i=x;i<=y;i++)
{
yesno=0;
for(j=2;j<=i/2;j+=2)
	{
	if(i%j==0)
		{
		yesno=1;
		break;
		}
	}
	if (yesno==0)
		{
		fprintf(fp,"%lld, ",i);
		}
	}
fclose(fp);
return 0;
}