如何在成员函数＃2中访问成员函数＃1中的变量？

Question

I'm starting to work with friends of classes. Here I have two functions called setMaxSickDays and getMaxSickDays. I made a variable called maxSickDays in setMaxSickDays that I'd like to access from getMaxSickDays.

class timeOff
{
public:
    void setMaxSickDays(numDays &friendlyObject) {  
        int maxSickDays;                         
        friendlyObject.hours = 240;
        maxSickDays = friendlyObject.hours;
    }

    void getMaxSickDays(numDays &friendlyObject) {
        cout << maxSickDays;
    }
};

The error: 'maxSickDays' was not declared in this scope

This may seem silly but I'm a beginner. Thanks!

Answer 1

You make maxSickDays a data member of your class.

class timeOff
{
 public:
  void setMaxSickDays(int days);
  int getMaxSickDays();
 private:
  int maxSickDays;
};

Answer 2

You can't access another function's local variable, even as friend . friend is used to granted to access members (ie member variables or functions) of the class.

See friend declaration

The friend declaration appears in a class body and grants a function or another class access to private and protected members of the class where the friend declaration appears.