c++ - 写入 wofstream 会产生异常

Question

我尝试将一些 wchar_t* 写入文件，但编译程序的命令行输出如下所示。本质上，程序在尝试写入希腊字符串时挂起。

el_GR.UTF-8
terminate called after throwing an instance of 'int'
Ακυρώθηκε (core dumped)

下面是源代码

#include <iostream>
#include <stdio.h>
#include <fstream>
#include <wchar.h>
using namespace std;

int main(int argc, char **argv)
{

    printf("%s\n",setlocale(LC_ALL,""));
    wofstream f("xxx.txt", ios::out);
    if(f.is_open())
    {
        try
        {
            f.write(L"good",4);
            f.flush();
            f.write(L"καλημερα",8);
            f.close();
        }
        catch (int e)
        {
            cout << "An exception occurred. Exception Nr. " << e <<endl;
        }

        printf("hello world\n");
        return 0;
    }
}

为什么？

Answer 1

流不从环境中获取语言环境。我补充说:

#include <locale>
locale loc("el_GR.utf8");
f.imbue(loc);

因此流现在包含要使用的语言环境(如果我错了请更正)。

正确运行的代码是:

#include <iostream>
#include <stdio.h>
#include <fstream>
#include <wchar.h>
#include <locale>


using namespace std;

int main(int argc, char **argv)
{
    locale loc("el_GR.utf8");
    wcout<<"Hi I am starting Ξεκινάμε"<<endl;
    cout<<"%s\n"<<setlocale(LC_ALL,"en_US.utf8")<<endl;
    wofstream f("xxx.txt", ios::out);
        if(f.is_open()){
            f.imbue(loc);

            f.write(L"good",4);f.flush();
            f.write(L"καλημέρα",8);
            f.close();
            cout<<"fileClosed"<<endl;
  }

    cout<<"hello world"<<endl;
    return 0;


}