runtime error..help me out plzz!!

#include<stdio.h>
void main()
{
int tc,num,i;
scanf("%d",&tc);
for(i=tc;i>0;i--)
{
scanf("%d",&num);
printf("%d\n",fact(num));
}
}
int fact(int n)
{
int c,f=1;
for(c=1;c<=n;c++)
{
f=f*c;
}
return f;
}