497: Mainline

Thus, there is no such data type as a string. When you hand over a string to a function, you supply a character pointer that points to the first character in that string. When you want to return a string from a function, you really ask for a pointer to the first character in that string.

For example, when you define the industry_name function, you declare that it is to return a character pointer as follows:

char* industry_name (struct trade *t) { 
  switch (t -> industry) { 
    case food:          return "Food";        break; 
    case trucking:      return "Trucking";    break; 
    ... 
  } 
}