Set local environment variables in C++

Question

How do I set an environment variable in C++?

• They do not need to persist past program execution
• They only need to be visible in the current process
• Preference for platform independent but for my problem only needs to work on Win32/64

Thanks

Answer 1

 NAME         putenv - change or add an environment variable  SYNOPSIS         #include &ltstdlib.h>         int putenv(char *string);  DESCRIPTION        The  putenv()  function adds or changes the value of environment        variables.  The argument string is of the form name=value.  If name does        not already exist in the environment, then string is added  to  the        environment.   If name does exist, then the value of name in the        environment is changed to value.  The string pointed to by string becomes        part of the environment, so altering the string changes the environment. 

On Win32 it's called _putenv I believe.

See SetEnvironmentVariable also if you're a fan of long and ugly function names.