coordinate_+=_7.cpp

#include <iostream>
using namespace std;

class coordinate
    {
        private:
            int x,y,z;
        public:
           void set()
                {
                    cout<<"Enter x:"<<endl;
                    cin>>x;
                    cout<<"Enter y:"<<endl;
                    cin>>y;
                    cout<<"Enter z:"<<endl;
                    cin>>z;
                }
            void print()
                {
                    cout<<"x:"<<x<<endl;
                    cout<<"y:"<<y<<endl;
                    cout<<"z:"<<z<<endl;
                }
            void operator +=(coordinate c) 
                {
                    x+=c.x;
                    y+=c.y;
                    z+=c.z;
                }
    };

int main() {
	// your code goes here
	coordinate d,e;
	d.set();
	e.set();
	d+=e;
	d.print();
	return 0;
}

=============output=================
Enter x:1
Enter y:2
Enter z:3
Enter x:1
Enter y:2
Enter z:4
	
x:2
y:4
z:7