编写代码获得当前用户名(GetUserName)、系统目录(GetSystemDirectory)、Windows所在目录(GetWindowsDirectory)、环境变量PATH的值等信息(ExpandEnvironmentStrings)，获得操作系统的版本信息(GetVersionEx)，不要使用GetVersionEx

好的，可以使用GetVersionEx函数的替代函数VerifyVersionInfo来获得操作系统的版本信息。下面是代码示例：

#include <iostream>
#include <Windows.h>

int main()
{
    // 获取当前用户名
    char username[UNLEN + 1];
    DWORD username_len = UNLEN + 1;
    GetUserNameA(username, &username_len);
    std::cout << "Current user: " << username << std::endl;

    // 获取系统目录
    char sys_dir[MAX_PATH];
    GetSystemDirectoryA(sys_dir, MAX_PATH);
    std::cout << "System directory: " << sys_dir << std::endl;

    // 获取Windows所在目录
    char win_dir[MAX_PATH];
    GetWindowsDirectoryA(win_dir, MAX_PATH);
    std::cout << "Windows directory: " << win_dir << std::endl;

    // 获取环境变量PATH的值
    char path[MAX_PATH];
    DWORD path_len = ExpandEnvironmentStringsA("%PATH%", path, MAX_PATH);
    if (path_len > MAX_PATH || path_len == 0) {
        std::cerr << "Failed to get PATH environment variable." << std::endl;
        return 1;
    }
    std::cout << "PATH: " << path << std::endl;

    // 获取操作系统版本信息
    OSVERSIONINFOEXA osvi = { sizeof(osvi) };
    DWORDLONG dwlConditionMask = 0;
    VER_SET_CONDITION(dwlConditionMask, VER_MAJORVERSION, VER_GREATER_EQUAL);
    VER_SET_CONDITION(dwlConditionMask, VER_MINORVERSION, VER_GREATER_EQUAL);
    VER_SET_CONDITION(dwlConditionMask, VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL);
    osvi.dwMajorVersion = 10;
    osvi.dwMinorVersion = 0;
    osvi.wServicePackMajor = 0;
    if (VerifyVersionInfoA(&osvi, VER_MAJORVERSION | VER_MINORVERSION | VER_SERVICEPACKMAJOR, dwlConditionMask)) {
        std::cout << "Operating system version: Windows 10 or newer" << std::endl;
    }
    else {
        std::cout << "Operating system version: Older than Windows 10" << std::endl;
    }

    return 0;
}