1. Code Organization Classes
CSCE 121

2. Recall Definitions can only happen once.
We can separate functions into different files.
#include related header file
We will do something similar with Classes!

3. Recall Method / member function definitions can be separated
from function declaration.
class Student { string name; // ... public: string getName (); void setName (string _name); }; string Student::getName () { return name; }
Consequently, they can
be placed into separate files.
Or we can leave the function declaration inside the class, but define (or implement) them outside. To do this, we need to use the scope resolution operator.
Notice that the return type still goes at the very beginning, and that the actual name of this function is Student::getName(); This distinguishes from other functions of the same name.
And also notice that since we specified that we are editing a member function of our class, we can directly access its private data members.

4. For classes
Filename (.cpp and either .h or .hpp) should be name of the class.
Start with a Capital Letter
Header File
Class definitions
Method / member function declarations
Class File
Class method / member function definitions.
Use scope resolution operator
Header guards are REALLY important here.
These header files contain definitions!

5. Class in Separate Files
Student.h #ifndef STUDENT_H #define STUDENT_H class Student { string name; int id; public: Student (string name, int id); string getName (); void setName (string name); }; #endif
Student.cpp
#include "Student.h"
Student::Student (string name, int id):
name(name), id(id) {}
string Student::getName () {
return name; }
void Student::setName(string name) {
this->name = name;
Or we can leave the function declaration inside the class, but define (or implement) them outside. To do this, we need to use the scope resolution operator.
Notice that the return type still goes at the very beginning, and that the actual name of this function is Student::getName(); This distinguishes from other functions of the same name.
And also notice that since we specified that we are editing a member function of our class, we can directly access its private data members.