What is the output of this program given?

#include iostream
using namespace std;
class stu
 {
    protected:
    int rno;
    public:
    void get_no(int a)
 {
    rno = a;
 }
    void put_no(void)
 {
        }
    };
    class test:public stu
    {
    protected:
    float part1,part2;
    public:
    void get_mark(float x, float y)
    {
        part1 = x;
        part2 = y;
    }
        void put_marks()
    {
    }
    };
    class sports
    {
        protected:
        float score;
        public:
        void getscore(float s)
        {
            score = s;
        }
        void putscore(void)
        {
        }
    };
    class result: public test, public sports
    {
        float total;
        public:
        void display(void);
    };
    void result::display(void)
    {
        total = part1 + part2 + score;
        put_no();
        put_marks();
        putscore();
        cout  "Total Score="  total  "\n";
    }
    int main()
    {
        result stu;
        stu.get_no(23);
        stu.get_mark(98.5, 43.0);
        stu.getscore(2.0);
        stu.display();
        return 0;
    }