#include <stdio.h>
#include <stdlib.h>

int main(void)
{
   char *val = getenv("PATH");
   printf("%s\n", val);

   int res = setenv("FUN", "random;environment;var", 1);
   printf("%d\n", res);

   char *fun_val = getenv("FUN");
   printf("%s\n", fun_val);

   return 0;

}