26. 使用fgetc()/fputc()实现文件的拷贝

//用fgetc()/fputc()实现文件的拷贝
#include <stdio.h>
#define F_PRINT_ERR(e)
do
{
    if(e == NULL)
    {
      printf("open error");
      exit(-1);
    }
}
while(0)
int main(int argc,char* argv[])
{

//基本实现：
    FILE* pfr = fopen("G:/qtcode/pfr.txt","r");
    F_PRINT_ERR(pfr);

    FILE* pfw = fopen("G:/qtcode/pfw.txt","w+");
    F_PRINT_ERR(pfw);
    char ch;
    while((ch = fgetc(pfr)) != EOF)
    {
        putchar(fputc(ch,pfw));//顺便打印在屏幕上
    }
    fclose(pfr);
    fclose(pfw);
    
#if 0
//实现CP命令
    FILE* pfr = fopen(argv[1],"r");
    F_PRINT_ERR(pfr);
    
    FILE* pfw = fopen(argv[2],"w+");
    F_PRINT_ERR(pfr);
    while((ch = fgetc(pfr)) != EOF)
    {
        putchar(fputc(ch,pfw));//顺便打印在屏幕上
    }
    fclose(pfr);
    fclose(pfw);
#endif

    return 0;
}