#include <stdlib.h>

extern char **environ;

int main(int argc, char **argv) 
{

    printf("argv: 0x%08X\n",argv);
    printf("env: 0x%08X\n",environ);
    
    int i=0;
    while(environ[i]!=NULL)
    {
	printf("envvar %s (0x%08X)\n" ,environ[i],environ[i]);
	i++;
    }

    putenv("supa=dupa");
    printf("env: 0x%08X\n",environ);
    
    i=0;
    while(environ[i]!=NULL)
    {
	printf("envvar %s (0x%08X)\n" ,environ[i],environ[i]);
	i++;
    }
    
    return 0;
}