Question

I have two classes, one called Grocery and the other one called Strings

In the Grocery.cpp I’m trying to use a function from the “Strings” class called : “copyString” and I get the following error:

identifier “copyString” is undefined

The “Strings” class is just a generic Class for the base string function such as : strcmp, strcpy and so on….

In the “Grocery” class I don’t want to create a “Strings” object but using It like a the “Math” class is being used in C#. Just indicating the class name and using a dot to call a function of the Class.

How can I create a class “Strings” with the same functionality as the “Math” class in C# I described above?

Thanks a lot!
Guy

Answer 1

Either you have a class Strings, with a method getStringLength(), in which case you need to call getStringLength() on a Strings instance:

Strings s = ....;
s.getStringLength();

or you have a namespace Strings with the method, in which case you need to call it like this:

Strings::getStringLength();

If the function is not related to the Strings class, consider making it a non-member function, in a suitable namespace:

Strings.h:

namespace StringFunctions
{
  int getStringLength();
}

Strings.cpp:

StringFunctions::getStringLength() { return 42; }