c语言实现最简单的写文件操作

#include "stdafx.h"
#include "stdio.h"
#include "stdlib.h"
void main()

{
 FILE *fp;
 char ch,filename[10];
 printf("intput filename:");
 scanf("%s",filename);
 if((fp=fopen(filename,"w"))==NULL)
 {
  printf("cannot open file\n");
  exit(0);
 }
 printf("intput content:\n");
  ch=getchar();
 while(ch!='#')
 {
   
   fputc(ch,fp);
   ch=getchar();
 }
 fputc(ch,fp);
 printf("intput file over\n");
 fclose(fp);
}