1 //用fgetc()/fputc()实现文件的拷贝 2 #include 
     
       3 #define F_PRINT_ERR(e)\ 4 do\ 5 {\ 6     if(e == NULL)\ 7     {\ 8       printf("open error");\ 9       exit(-1);\10     }\11 }\12 while(0)13 int main(int argc,char* argv[])14 {15 16 //基本实现：17     FILE* pfr = fopen("G:/qtcode/pfr.txt","r");18     F_PRINT_ERR(pfr);19 20     FILE* pfw = fopen("G:/qtcode/pfw.txt","w+");21     F_PRINT_ERR(pfw);22     char ch;23     while((ch = fgetc(pfr)) != EOF)24     {25         putchar(fputc(ch,pfw));//顺便打印在屏幕上26     }27     fclose(pfr);28     fclose(pfw);29     30 #if 031 //实现CP命令32     FILE* pfr = fopen(argv[1],"r");33     F_PRINT_ERR(pfr);34     35     FILE* pfw = fopen(argv[2],"w+");36     F_PRINT_ERR(pfr);37     while((ch = fgetc(pfr)) != EOF)38     {39         putchar(fputc(ch,pfw));//顺便打印在屏幕上40     }41     fclose(pfr);42     fclose(pfw);43 #endif44 45     return 0;46 }