转，原文地址https://blog.csdn.net/hellokandy/article/details/52242365
常用的系统环境变量有：
WINDIR: //系统目录 - C:\WINDOWS SYSTEMROOT: //系统目录 - C:\WINDOWS SYSTEMDRIVE: //系统根目录 - C: HOMEDRIVE: //当前用户根目录 - C: USERPROFILE: //当前用户目录 - C:\Users\Kandy HOMEPATH: //当前用户路径 - \Users\Kandy TMP: //当前用户临时文件夹 - C:\Users\Kandy\AppData\Local\Temp TEMP: //当前用户临时文件夹 - C:\Users\Kandy\AppData\Local\Temp APPDATA: //当前用户数据文件夹 - C:\Users\Kandy\AppData\Roaming PROGRAMFILES: //程序默认安装目录 - C:\Program Files (x86) COMMONPROGRAMFILES: //文件通用目录 - C:\Program Files (x86)\Common Files USERNAME: //当前用户名 - Kandy ALLUSERSPROFILE: //所有用户文件目录 - C:\ProgramData OS: //操作系统名 - Windows_NT COMPUTERNAME: //计算机名 - KANDY-PC NUMBER_OF_PROCESSORS: //处理器个数 - 4 PROCESSOR_ARCHITECTURE: //处理器芯片架构 - x86 PROCESSOR_LEVEL: //处理器型号 - 6 PROCESSOR_REVISION: //处理器修订号 - 3c03 USERDOMAIN: //包含用户帐号的域 - KANDY-PC COMSPEC: //C:\WINDOWS\system32\cmd.exe PATHEXT: //执行文件类型 - .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC PATH: //搜索路径
使用 GetEnvironmentVariable 来获取环境变量：
1 #include <Windows.h>
2 #include <iostream>
3
4 int main()
5 {
6 wchar_t buffer[MAX_PATH];
7 DWORD code = GetEnvironmentVariable(L"WINDIR", buffer, MAX_PATH);
8 std::wcout << L"WINDIR:\t\t\t" << buffer << std::endl;
9
10 GetEnvironmentVariable(L"SYSTEMROOT", buffer, MAX_PATH);
11 std::wcout << L"SYSTEMROOT:\t\t" << buffer << std::endl;
12
13 GetEnvironmentVariable(L"SYSTEMDRIVE", buffer, MAX_PATH);
14 std::wcout << L"SYSTEMDRIVE:\t\t" << buffer << std::endl;
15
16 GetEnvironmentVariable(L"HOMEDRIVE", buffer, MAX_PATH);
17 std::wcout << L"HOMEDRIVE:\t\t" << buffer << std::endl;
18
19 GetEnvironmentVariable(L"USERPROFILE", buffer, MAX_PATH);
20 std::wcout << L"USERPROFILE:\t\t" << buffer << std::endl;
21
22 GetEnvironmentVariable(L"HOMEPATH", buffer, MAX_PATH);
23 std::wcout << L"HOMEPATH:\t\t" << buffer << std::endl;
24
25 GetEnvironmentVariable(L"TMP", buffer, MAX_PATH);
26 std::wcout << L"TMP:\t\t\t" << buffer << std::endl;
27
28 GetEnvironmentVariable(L"TEMP", buffer, MAX_PATH);
29 std::wcout << L"TEMP:\t\t\t" << buffer << std::endl;
30
31 GetEnvironmentVariable(L"APPDATA", buffer, MAX_PATH);
32 std::wcout << L"APPDATA:\t\t" << buffer << std::endl;
33
34 GetEnvironmentVariable(L"PROGRAMFILES", buffer, MAX_PATH);
35 std::wcout << L"PROGRAMFILES:\t\t" << buffer << std::endl;
36
37 GetEnvironmentVariable(L"COMMONPROGRAMFILES", buffer, MAX_PATH);
38 std::wcout << L"COMMONPROGRAMFILES:\t" << buffer << std::endl;
39
40 GetEnvironmentVariable(L"USERNAME", buffer, MAX_PATH);
41 std::wcout << L"USERNAME:\t\t" << buffer << std::endl;
42
43 GetEnvironmentVariable(L"ALLUSERSPROFILE", buffer, MAX_PATH);
44 std::wcout << L"ALLUSERSPROFILE:\t" << buffer << std::endl;
45
46 GetEnvironmentVariable(L"OS", buffer, MAX_PATH);
47 std::wcout << L"OS:\t\t\t" << buffer << std::endl;
48
49 GetEnvironmentVariable(L"COMPUTERNAME", buffer, MAX_PATH);
50 std::wcout << L"COMPUTERNAME:\t\t" << buffer << std::endl;
51
52 GetEnvironmentVariable(L"NUMBER_OF_PROCESSORS", buffer, MAX_PATH);
53 std::wcout << L"NUMBER_OF_PROCESSORS:\t" << buffer << std::endl;
54
55 GetEnvironmentVariable(L"PROCESSOR_ARCHITECTURE", buffer, MAX_PATH);
56 std::wcout << L"PROCESSOR_ARCHITECTURE:\t" << buffer << std::endl;
57
58 GetEnvironmentVariable(L"PROCESSOR_LEVEL", buffer, MAX_PATH);
59 std::wcout << L"PROCESSOR_LEVEL:\t" << buffer << std::endl;
60
61 GetEnvironmentVariable(L"PROCESSOR_REVISION", buffer, MAX_PATH);
62 std::wcout << L"PROCESSOR_REVISION:\t" << buffer << std::endl;
63
64 GetEnvironmentVariable(L"USERDOMAIN", buffer, MAX_PATH);
65 std::wcout << L"USERDOMAIN:\t\t" << buffer << std::endl;
66
67 GetEnvironmentVariable(L"COMSPEC", buffer, MAX_PATH);
68 std::wcout << L"COMSPEC:\t\t" << buffer << std::endl;
69
70 GetEnvironmentVariable(L"PATHEXT", buffer, MAX_PATH);
71 std::wcout << L"PATHEXT:\t\t" << buffer << std::endl;
72
73 GetEnvironmentVariable(L"PATH", buffer, MAX_PATH);
74 std::wcout << L"PATH:\t\t" << buffer << std::endl;
75
76 system("pause");
77 return 0;
78 }
原文地址：https://www.cnblogs.com/AndyZhou/p/10011032.html
时间： 2024-10-12 19:34:54