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Only Do What Only You Can Do
106. environment variable
Hyperpolyglot C++ Style Languages: C++, Objective C, Java, C# より (2012.05.08)
VBScript
JScript
Perl
PHP
Python
Ruby
PowerShell
Scala
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C
C++
#include <stdlib.h>
char *home = getenv("HOME");
setenv("EDITOR", "emacs", 1);
unsetenv("EDITOR");
C++Builder
VC++
C#
using System.Environment;
string home = GetEnvironmentVariable("HOME");
SetEnvironmentVariable("EDITOR", "emacs");
SetEnvironmentVariable("EDITOR", null);
Java
String home = System.getenv("HOME");
Objective-C
NSString *home = [[[NSProcessInfo processInfo] environment] objectForKey:@"HOME"];