无法将 std::wstring 写入 wofstream

发布于 2024-10-19 01:19:35 字数 1116 浏览 2 评论 0原文

我在 Linux 系统上使用 Qt/C++。我需要将 QLineEdit 的文本转换为 std::wstring 并将其写入 std::wofstream。它适用于 ascii 字符串，但当我输入任何其他字符（阿拉伯语或乌兹别克语）时，文件中没有写入任何内容。（文件大小为 0 字节）。

这是我的代码：

wofstream customersFile;
customersFile.open("./customers.txt");
std::wstring ws = lne_address_customer->text().toStdWString();
customersFile << ws << ws.length() << std::endl;

在行编辑中输入的 John Smith 的输出是 John Smith10。但对于 unicode 字符串来说，什么也没有。

首先，我认为这是 QString::toStdWString() 的问题，但是 customersFile << ws.length(); 写入所有字符串的正确长度。所以我想我在文件中写入 wstring 时犯了一些错误。 [？]

编辑：

我在 eclipse 中再次编写它。并用g++4.5编译它。结果是一样的：

#include <iostream>
#include <string>
#include <fstream>

using namespace std;

int main()
{
   cout << "" << endl; // prints
   wstring ws = L"سلام"; // this is an Arabic "Hello"
   wofstream wf("new.txt");
   if (!wf.bad())
      wf << ws;
   else
      cerr << "some problem";
   return 0;
}

原文

I'm using Qt/C++ on a Linux system. I need to convert a QLineEdit's text to std::wstring and write it into a std::wofstream. It works correctly for ascii strings, but when I enter any other character (Arabic or Uzbek) there is nothing written in the file. (size of file is 0 bytes).

this is my code:

wofstream customersFile;
customersFile.open("./customers.txt");
std::wstring ws = lne_address_customer->text().toStdWString();
customersFile << ws << ws.length() << std::endl;

Output for John Smith entered in the line edit is John Smith10. but for unicode strings, nothing.

First I thought that is a problem with QString::toStdWString(), but customersFile << ws.length(); writes correct length of all strings. So I guess I'm doing something wrong wrong with writing wstring in file. [?]

EDIT:

I write it again in eclipse. and compiled it with g++4.5. result is same:

#include <iostream>
#include <string>
#include <fstream>

using namespace std;

int main()
{
   cout << "" << endl; // prints
   wstring ws = L"سلام"; // this is an Arabic "Hello"
   wofstream wf("new.txt");
   if (!wf.bad())
      wf << ws;
   else
      cerr << "some problem";
   return 0;
}

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