复制文件。输入完整已存在的文本文件名，再输入一个新文本文件的完整文件名，利用文本编辑软件查看文件内容，验证程序执行结果

 1 #include "stdafx.h"
 2 #include <stdio.h>
 3 #include <stdlib.h>
 4 #define N 80
 5 int CopyFile(const char *srcName,const char *dstName);
 6 int main()
 7 {
 8     char srcFilename[N];
 9     char dstFilename[N];
10     printf_s("input source filename:");
11     scanf_s("%s",srcFilename,sizeof(srcFilename));
12     printf_s("Input destination filename:");
13     scanf_s("%s",dstFilename,sizeof(dstFilename));
14     if(CopyFile(srcFilename,dstFilename))
15         printf_s("Copy succeed!\n");
16     else
17         printf_s("Copy failed!\n");
18     system("pause");
19     return 0;
20 }
21 int CopyFile(const char *srcName,const char *dstName)
22 {
23     FILE *fpSrc = NULL,*fpDst = NULL;
24     int ch, rval =1;
25     if(fopen_s(&fpSrc,srcName,"r"))
26         goto ERROR;
27     if(fopen_s(&fpDst,dstName,"w"))
28         goto ERROR;
29     while((ch = fgetc(fpSrc)) != EOF)
30     {
31         if(fputc(ch,fpDst) == EOF)
32             goto ERROR;
33     }
34     fflush(fpDst);
35     goto EXIT;
36 ERROR :
37     rval = 0;
38 EXIT:
39     if(fpSrc != NULL) fclose(fpSrc);
40     if(fpDst != NULL) fclose(fpDst);
41     return rval;
42 }