如何正确使用dirent.h

Question

我是C++的新手,我正在尝试使用dirent.h头来操作目录条目.以下小应用程序编译后,你补充目录名称后呕吐.有人能给我一个暗示吗？int退出是为了提供while循环.我删除了循环以试图隔离我的问题.

谢谢!

#include <iostream>
#include <dirent.h>

using namespace std;

int main()
{

char *dirname = 0;
    DIR *pd = 0;
    struct dirent *pdirent = 0;

    int quit = 1;



    cout<< "Enter a directory path to open (leave blank to quit):\n";
    cin >> dirname;

    if(dirname == NULL)
    {
        quit = 0;

    }
        pd = opendir(dirname);

    if(pd == NULL)
    {
        cout << "ERROR: Please provide a valid directory path.\n";
    }


    return 0;
}

Answer 1

如果您使用的是C++,请不要使用char*或数组,请使用std :: string:

#include <string>
....   
string dirname;
cout<< "Enter a directory path to open (leave blank to quit):\n";
getline( cin, dirname );
if ( dirname == "" ) {
   exit(1);
}
....   
pd = opendir(dirname.c_str() );

Answer 2

更改:

char *dirname = 0;

至:

char dirname[PATH_MAX] = "";