c - 我的文件指针设置错了吗？

Question

#include "stdafx.h"
#include "string.h"
#include "stdio.h"
void CharReadWrite(FILE *fin);
FILE *fptr2;

int _tmain(int argc, _TCHAR* argv[])
{   

    char filename[]="ReadMe.txt";
    if (fopen_s( &fptr2, filename, "r" ) != 0 )
      printf( "File stream %s was not opened\n", filename );
    else
      printf( "The file %s was opened\n", filename );
    CharReadWrite(fptr2);
    fclose(fptr2);
    return 0;
    }
void CharReadWrite(FILE *fin){
    int c;
    while ((c=fgetc(fin)) !=EOF) {
        putchar(c);}
}

Answer 1

您正在打开 ReadMe.txt 进行写作:

fopen_s( &fptr2, filename, "w" )

然后将其传递给 CharReadWrite:

CharReadWrite(fptr2);

它试图从中读取:

c=fgetc(fin)

您是要通过将 “r” 传递给 fopen_s 来打开它进行阅读吗？

如果打开 ReadMe.txt 失败，您还可以继续调用 CharReadWrite。