程序代码：

#include"stdio.h"
#include"stdlib.h"
//#define LEN 40

int main()
{
  int i = 0,k =0,ch;
  FILE *in,*out;
  //char temp[LEN];
  //char name[10];


 
     if(in = fopen("first01.txt","r") ==NULL)
     {
         fprintf(stderr,"Usage: first01.txt filename\n");
         exit(1);
     }

     if(out = fopen("first.txt","w") == NULL)
     {
         fprintf(stderr,"Can't create output file.\n");
         exit(2);
     }
    
     while((ch = getc(in)) != EOF)
     {
       putc(ch,out);
     }
    

          //fgets(temp,8,in);
          //fputs(temp,out);
   
/************************
     if(i % 5 == 0)
      fputs("\n",out);
     else
      fputs(",",out);
************************/

  if(fclose(in) == 0 || fclose(out) == 0)
      fprintf(stderr,"Error in close file.\n");
  return 0;
    
}