程序代码：

#include <iostream>

int main() {
    wchar_t buf1[3] = L"中文";
    wchar_t buf2[3];
    char    buf3[5];

    std::wcin >> buf2;

    std::cin  >> buf3;

    std::cout << std::endl << std::hex;
    std::cout << "buf1 : " << buf1[0] << buf1[1] << std::endl;
    std::cout << "buf2 : " << buf2[0] << buf2[1] << std::endl;
    std::cout << "buf3 : " << (wchar_t)buf3[0] << (wchar_t)buf3[2] << std::endl;

    std::cout << std::endl;

    std::wcout << "buf1 : " << buf1 << std::endl;
    std::wcout << "buf2 : " << buf2 << std::endl;
    std::cout  << "buf3 : " << buf3 << std::endl;
    return 0;
}
/*
中文
中文

buf1 : c40
buf2 : d6d0
buf3 : ffd6ffce

buf1 :
buf2 : 中文
buf3 : 中文

Process returned 0 (0x0)   execution time : 4.672 s
Press any key to continue.
*/