confcopy.c

来自「《C／C++程序员实用大全》配套代码,适用初学C++的人员。」· C语言 代码 · 共 21 行

#include <stdio.h>

void main(void)
 {
   FILE *input, *output;
   int letter;

   if ((input = fopen("\\CONFIG.SYS", "r")) == NULL)
     printf("Error opening \\CONFIG.SYS\n");
   else if ((output = fopen("\\CONFIG.TST", "w")) == NULL)
     printf("Error opening \\CONFIG.TST\n");
   else
     { 
       // Read and write each character in the file
       while ((letter = fgetc(input)) != EOF)
         fputc(letter, output);
       fclose(input);     // Close the input file
       fclose(output);    // Close the output file
     }
 }