//CLASS
class myClass{
    private:
    int xx1, xx2;
    public:
        myClass(int var1, int var2) : xx1(var1), xx2(var2) {}
        myClass functioname(myClass c){
            c.xx1 += xx1;
                    c.xx2 += xx2;
                    return c;
        }
};

//TESTING PROGRAM
#include </path/to/file>
int main(){
    myClass class1 = myClass(1,2);
    myClass class2 = myClass(3,4);
    class1.functioname(class2);
}