ch13_3.c

C语言程序设计上机指导与练习 冶金工业出版社 刘怀亮

/*CH13_3*/
#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
main(int argc,char *argv[])
{
   FILE *fp1,*fp2;
   char ch;
   if(argc==1)
   {
      printf("have not enter file name strike any key exit");
      getch();
      exit(1);
   }
   if((fp1=fopen(argv[1],"rt"))==NULL)
   {
      printf("Cannot open %s\n",argv[1]);
      getch();
      exit(1);
   }
   if(argc==2) fp2=stdout;
   else if((fp2=fopen(argv[2],"wt+"))==NULL)
   {
      printf("Cannot open %s\n",argv[1]);
      getch();
   }
   while((ch=fgetc(fp1))!=EOF)
   fputc(ch,fp2);
   fclose(fp1);
   fclose(fp2);
}