c ++：从另一个类调用一个类的变量

Question

I have a class lets say

class ABC
{
   int x;
   char y;
  ....
}

another class

class xyz{
   int UseVariablOfABC(int a,char b)
   // a and b are the variables/members declared in class ABC above
}

int xyz::UseVariablOfABC(int a,char b){
//Do some thing with a and b
}

xyz class is abstracted from the user(means he cant set the value of arguments of its member function here it is useVariableofABC ), user can only use ABC class .... Is it posible in c++... Do i need create a object of class ABC in xyz ......

any suggestions plz ........

Answer 1

If the members of ABC aren't static , then yes, you do need an instance. And if you only want the arguments of xyz::UseVariablOfABC to be members of ABC , just pass that instance as parameter instead:

int xyz::UseVariablOfABC(const ABC&)