- strcpy (temp_filename + base_len, TEMP_FILE);
- strcpy (temp_filename + base_len + TEMP_FILE_LEN, suffix);
+ strcpy (temp_filename + base_len, prefix);
+ strcpy (temp_filename + base_len + prefix_len, TEMP_FILE);
+ strcpy (temp_filename + base_len + prefix_len + TEMP_FILE_LEN, suffix);