Hierarchy/Inheritance/Polymorphism 2. Write a snippet of code to declare (.h) an

Question

Hierarchy/Inheritance/Polymorphism

2. Write a snippet of code to declare (.h) and the implement (.cpp) the family of classes in quality control domain, including

-base class “Test”

-derived classes RegressionTest, loadTest

The base class should have a virtual boolean method called run which is overridden in the sub-class, where specific logic is placed(//some code). As an exercise, let the method return true/false randomly.

Then in main, declare a pointer to the base class Test and use it to instantiate and run loadTest. Then use the same pointer to instantiate and run a RegressionTest.

Explanation / Answer

CODE:

#include<iostream>
using namespace std;

class Test
{
public:
   virtual bool run() {
   cout<<" In Base class ";
   return true;
   }
};

class RegressionTest: public Test
{
public:
   bool run() {
   cout<<"In RegressionTest ";
   return false;
   }
};

class LoadTest: public Test
{
public:
   bool run() {
   cout<<"In LoadTest ";
   return true;
   }
};

int main(void)
{
   Test *bp = new LoadTest;
   cout << bp->run() << endl; // RUN-TIME POLYMORPHISM
   bp = new RegressionTest;
   cout << bp->run() << endl; // RUN-TIME POLYMORPHISM
   return 0;
}

OUTPUT:
In LoadTest
1
In RegressionTest
0

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