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char *tmpvar;
char *tempvar;

tmpvar = getenv("TMP");
if (!tmpvar) return -1;
tempvar = getenv("TEMP");
if (!tempvar) return -1;

if (strcmp(tmpvar, tempvar) == 0) {
  if (puts("TMP and TEMP are the same.\n");) == EOF) {
    /* Handle Error */
  }
}
else {
  if (puts("TMP and TEMP are NOT the same.\n"); == EOF) {
    /* Handle Error */
  }
}

char *tmpvar;
char *tempvar;
size_t requiredSize;

getenv_s(&requiredSize, NULL, 0, "TMP");
tmpvar = (char *)malloc(requiredSize * sizeof(char));
if (!tmpvar) {
   /* Handle error */
}
getenv_s(&requiredSize, tmpvar, requiredSize, "TMP" );

getenv_s(&requiredSize, NULL, 0, "TEMP");
tempvar = (char *)malloc(requiredSize * sizeof(char));
if (!tempvar) {
   free(tmpvar);
   tmpvar = NULL;
   /* Handle error */
}
getenv_s(&requiredSize, tempvar, requiredSize, "TEMP" );

if (strcmp(tmpvar, tempvar) == 0) {
  if (puts("TMP and TEMP are the same.\n");) == EOF) {
    /* Handle Error */
  }
}
else {
  if (puts("TMP and TEMP are NOT the same.\n");) == EOF) {
    /* Handle Error */
  }
}
free(tmpvar);
tmpvar = NULL;
free(tempvar);
tempvar = NULL;

char *tmpvar;
char *tempvar;
size_t len;

errno_t err = _dupenv_s(&tmpvar, &len, "TMP");
if (err) return -1;
errno_t err = _dupenv_s(&tempvar, &len, "TEMP");
if (err) {
  free(tmpvar);
  tmpvar = NULL;
  return -1;
}

if (strcmp(tmpvar, tempvar) == 0) {
  if (puts("TMP and TEMP are the same.\n"); == EOF) {
    /* Handle Error */
  }
}
else {
  if (puts("TMP and TEMP are NOT the same.\n");) == EOF) {
    /* Handle Error */
  }
}
free(tmpvar);
tmpvar = NULL;
free(tempvar);
tempvar = NULL;

char *tmpvar;
char *tempvar;

char *temp = getenv("TMP");
if (temp != NULL) {
  tmpvar = strdup(temp);
  if (tmpvar == NULL) {
    /* Handle Error */
  }
}
else {
  return -1;
}

temp = getenv("TEMP");
if (temp != NULL) {
  tempvar = strdup(temp);
  if (tempvar == NULL) {
    free(tmpvar);
    tmpvar = NULL;
    /* Handle Error */
  }
}
else {
  free(tmpvar);
  tmpvar = NULL;
  return -1;
}

if (strcmp(tmpvar, tempvar) == 0) {
  if (puts("TMP and TEMP are the same.\n"); == EOF) {
    /* Handle Error */
  }
}
else {
  if (puts("TMP and TEMP are NOT the same.\n");) == EOF) {
    /* Handle Error */
  }
}
free(tmpvar);
tmpvar = NULL;
free(tempvar);
tempvar = NULL;

char *tmpvar;
char *tempvar;

char *temp = getenv("TMP");
if (temp != NULL) {
  tmpvar = (char *)malloc(strlen(temp)+1);
  if (tmpvar != NULL) {
    strcpy(tmpvar, temp);
  }
  else {
    /* Handle Error */
  }
}
else {
  return -1;
}

temp = getenv("TEMP");
if (temp != NULL) {
  tempvar = (char *)malloc(strlen(temp)+1);
  if (tempvar != NULL) {
    strcpy(tempvar, temp);
  }
  else {
    free(tmpvar);
    tmpvar = NULL;
    /* Handle Error */
  }
}
else {
  free(tmpvar);
  tmpvar = NULL;
  return -1;
}

if (strcmp(tmpvar, tempvar) == 0) {
  if (puts("TMP and TEMP are the same.\n");) == EOF) {
    /* Handle Error */
  }
}
else {
  if (puts("TMP and TEMP are NOT the same.\n"); == EOF) {
    /* Handle Error */
  }
}
free(tmpvar);
tmpvar = NULL;
free(tempvar);
tempvar = NULL;