MyClassA/B/C

//18.11.2015p OOP
#include <cstdlib>
#include <iostream>

using namespace std;

class MyClassA
{
      private:
              int A;
      public:
             void setA(int f)
             {
                  A=f;
             }
             int getA()
             {
                 return A;
             }
             };
class MyClassB : public MyClassA
             {
      private:
              int B;
      public:
             void Show()
             {
                  cout<<"A="<<getA()<<endl;
                  cout<<"B="<<getB()<<endl;
             }
             void setB(int t)
             {
                  B=t;
                  }
             int getB()
             {
                 return B;
             }
             };
class MyClassC : public MyClassB
             {
      private:
              int C;
      public:
             void Show()
             {
                  cout<<"C="<<getC()<<endl;
                  }
             void setC(int n)
             {
                  C=n;
             }
             int getC()
             {
                 return C;
             }
             };

int main(int argc, char *argv[])
{
    MyClassA ObjA;
    MyClassB ObjB;
    MyClassC ObjC;
    ObjA.setA(5);
    ObjB.setB(6);
    ObjB.setA(5);
    ObjC.setC(7);
    ObjC.setB(6);
    ObjB.Show();
    ObjC.Show();

  system("PAUSE");
  return 0;
}