大神们，帮忙看下，哪里有问题

#include<stdio.h>
#include<stdlib.h>
#include<errno.h>
int main()
{
FILE *p,*q;
char ch;
p=fopen("123","r");
if(p==NULL)
{
perror("fopen()");
}
q=fopen("110","w");
if(q==NULL)
{
perror("fopen()");
}
while(1)
{
ch = fgetc(p);
if (ch != EOF)
fputc(ch, q);
}
fclose(p);
fclose(q);
exit(0);
}