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

#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#define N 80
int CopyFile(const char *srcName,const char *dstName);
int main()
{
    char srcFilename[N];
    char dstFilename[N];
    printf_s("input source filename:");
    scanf_s("%s",srcFilename,sizeof(srcFilename));
    printf_s("Input destination filename:");
    scanf_s("%s",dstFilename,sizeof(dstFilename));
    if(CopyFile(srcFilename,dstFilename))
        printf_s("Copy succeed!
");
    else
        printf_s("Copy failed!
");
    system("pause");
    return 0;
}
int CopyFile(const char *srcName,const char *dstName)
{
    FILE *fpSrc = NULL,*fpDst = NULL;
    int ch, rval =1;
    if(fopen_s(&fpSrc,srcName,"r"))
        goto ERROR;
    if(fopen_s(&fpDst,dstName,"w"))
        goto ERROR;
    while((ch = fgetc(fpSrc)) != EOF)
    {
        if(fputc(ch,fpDst) == EOF)
            goto ERROR;
    }
    fflush(fpDst);
    goto EXIT;
ERROR :
    rval = 0;
EXIT:
    if(fpSrc != NULL) fclose(fpSrc);
    if(fpDst != NULL) fclose(fpDst);
    return rval;
}

测试 

1，Input source filename : a.txt  (a文件存在)

    Input destination filename : b.txt

   Copy succeed!

2,

Input source filename : a.txt  (a文件不存在)

    Input destination filename : b.txt

   Copy failed!