[C/C++] Environment variables as argument to main()

Most of us may not have noticed that main() supports a third argument which will provide you an array of pointers to environment variable strings. See the below code,

int main( int nArgc, char* pcArgv[], char* pcenv[ ])
{
    int nIdx = 0;
    while ( pcenv[ nIdx ] )
      printf ( "%s\n", pcenv[ nIdx++ ] );
    return 0;
}

The above program will print all the environment variables in the console window