c++] 시스템의 환경 변수 얻기 std::getenv

http://en.cppreference.com/w/cpp/utility/program/getenv

std::getenv

 C++ Utilities library Program support utilities

Defined in header <cstdlib>

char* getenv( const char* env_var );

Searches the environment list provided by the host environment (the OS), for a string that matches the C string pointed to by env_var and returns a pointer to the C string that is associated with the matched environment list member.

#include <iostream>

#include <cstdlib>

 

int main()

{

    if(const char* env_p = std::getenv("PATH"))

        std::cout << "Your PATH is: " << env_p << '\n';

}