C++: Functions Returning objects

Functions Returning objects

Member Functions not only receive object as argument it can also return an object.

Illustration 14.11 C++ program to illustrate how an object is returned to the calling function

#include <iostream>

using namespace std;

class Sample

{

      private:

           int num;

      public:

      void set (int x)

      {

      num = x;

      }

      Sample pass(Sample obj1, Sample obj2) //

      {

      Sample s4;

      s4.num=obj1.num+obj2.num;

      return s4;

      }

      }

      void print()

      {

      cout<<num;

      }

};

int main()

{

      //object declarations

      Sample s1;

      Sample s2;

      Sample s3;

      //assigning values to the data member of objects

      s1.set(10);

      s2.set(20);

      cout<<"\n\t\t Example program for Returning an object \n\n\n";

      //passing object s1 and s2

      s3=s3.pass(s1,s2);

      //printing the values of object

      cout<<"\nThe value of s1.num is ";

      s1.print();

      cout<<"\nThe value of s2.num is ";

      s2.print();

      //printing the sum

      cout<<"\nThe sum s3.num is ";s3.print();

      return 0;

}

Output:

Example program for Returning an object

The value of s1.num is 10

The value of s2.num is 20

The sum s3.num is 30