Question

FindFirstFile函数以某种方式不接受我的wstring（也不是字符串）作为参数传递。

我收到编译错误

Cannot convert const char[9] to std::basic_string

#include "stdafx.h"
#include <string>
#include <iostream>
#include <stdio.h>
#include <Windows.h>


using namespace std;


int _tmain(int argc, _TCHAR* argv[])
{
    wstring path = "C:\\*.dmp";
    WIN32_FIND_DATA dataFile;
    HANDLE hFind;

    hFind = FindFirstFile (path.c_str(), &dataFile);


    cout << "The name of the first found file is %s \n" dataFile.cFileName << endl;
    FindClose hFind;
    getchar();
    return 0;
}

Answer 1

我收到编译错误

Cannot convert const char[9] to std::basic_string

您需要wide char literal正确初始化std::wstring：

wstring path = L"C:\\*.dmp";
            // ^

你还错过了另一个<<

cout << "The name of the first found file is " << dataFile.cFileName << endl;`
                                            // ^^

另请注意，output formatting with std::ostream与printf()格式字符串样式不同。注意我从上面的示例中删除了%s。

Answer 2

更改

const char path[] = "C:\\*.dmp";           // C-style string

hFind = FindFirstFile(path, &dataFile);    // Pass the string directly

c ++ FindFirstFile无法将const char转换为basic_string

2 个答案: