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

int main() {
  string_t s;
  putenv("TESINGENV=testingenv");
  s = getenv("TESINGENV");
  printf("s = %s\n", s);

  remenv("TESINGENV");
  s = getenv("TESINGENV");
  if(s == NULL)
    printf("ok: s = NULL\n");
  else
    printf("error: s = %s\n", s);
}
