用C语言实现文件读写操作

#include “stdio.h”
main()
{
        FILE *fp;
        char ch,filename[10];
        scanf(“%s”,filename);
        if((fp=fopen(filename,”w”)==NULL)
        {
printf(“cann’t open filen”);
exit(0);
  }
  ch=getchar();
  while(ch!=’#’)
  {
       fputc(ch,fp);
       putchar(ch);
       ch=getchar();
  }
  fclose(fp);
}