c++ - Is it possible to take two values of one class to another class and use it? -

i beginner. and, tried one.

#include <iostream> using namespace std;  class square {     int number;      public:     square(int a): number(a) {}      int getsquare()     {         return number*number;     } };  class sumnumber {     square a;     int firnum;     int secnum;      public:     sumnumber(int number, int x, int y): a(number),firnum(x), secnum(y) {}      int getsumnumber() //output-er     {         return firnum + secnum + a.getsquare();     } };  int main() {     sumnumber a(2,3,4); //sums squared number 2, , 3 , 4      cout << "sum of numbers\t" << a.getsumnumber() << endl; //=11 } 

but, if wanted have 2 values of class square

class square {     int number;     int nextnumber;      public:     ... }; 

and on other class

class sumnumber    //creating class sumnumber {      square a;     int firnum; //first number     int secnum; //second number      public:     ... }; 

question is: possible take 2 values declared in square class sumnumber? if so, how?

i think looking having getter. method can return value of private member, since square class returning square of number can change follows:

class square {     int number;     int nextnumber;      public:     square(int a, int b): number(a), nextnumber(b) {}      int getnumbersquared()     {         return number*number;     }      int getnextnumbersquared()     {         return nextnumber*nextnumber;     } }; 

and in other class can have this:

    class sumnumber     {         square a;         int firnum;         int secnum;          public:         sumnumber(int number, int nextnumber,int x, int y):  a(number, nextnumber),firnum(x), secnum(y) {}          int getsumnumber() //output-er         {             return firnum + secnum + a.getnumbersquared() + a.getnextnumbersquared();         }     };