Commit 07e4991

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Demos

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Lines changed: 34 additions & 0 deletions

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	`1`	`+#include <iostream>`
	`2`	`+`
	`3`	`+using namespace std;`
	`4`	`+`
	`5`	`+class Base`
	`6`	`+{`
	`7`	`+ public:`
	`8`	`+ void function1();`
	`9`	`+ void function2();`
	`10`	`+ void function3();`
	`11`	`+};`
	`12`	`+`
	`13`	`+`
	`14`	`+class Derived : public Base`
	`15`	`+{`
	`16`	`+ public:`
	`17`	`+ void function4();`
	`18`	`+ void function5();`
	`19`	`+};`
	`20`	`+`
	`21`	`+int main(void)`
	`22`	`+{`
	`23`	`+ Base *ptr;`
	`24`	`+ ptr = new Derived();`
	`25`	`+`
	`26`	`+ ptr ->function1();`
	`27`	`+ ptr ->function2();`
	`28`	`+ ptr ->function3();`
	`29`	`+`
	`30`	`+ Derived *ptrd;`
	`31`	`+ // ptrd = new Base(); // this is not correct -> the specialized class pointer can not be represented by an object of type Base as this object does not have all the specialized functions`
	`32`	`+`
	`33`	`+ return 0;`
	`34`	`+}`

Lines changed: 30 additions & 0 deletions

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	`1`	`+#include <iostream>`
	`2`	`+`
	`3`	`+using namespace std;`
	`4`	`+`
	`5`	`+class Base`
	`6`	`+{`
	`7`	`+ public:`
	`8`	`+ void function1()`
	`9`	`+ {`
	`10`	`+ cout<<"Function1 called here"<<endl;`
	`11`	`+ }`
	`12`	`+};`
	`13`	`+`
	`14`	`+class Derived: public Base`
	`15`	`+{`
	`16`	`+ public:`
	`17`	`+ void function2()`
	`18`	`+ {`
	`19`	`+ cout<<"Function2 called here"<<endl;`
	`20`	`+ }`
	`21`	`+};`
	`22`	`+`
	`23`	`+int main(void)`
	`24`	`+{`
	`25`	`+ Base *ptr;`
	`26`	`+ ptr->function1();`
	`27`	`+ //ptr->function2();`
	`28`	`+`
	`29`	`+ return 0;`
	`30`	`+}`

Lines changed: 36 additions & 0 deletions

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	`1`	`+#include <iostream>`
	`2`	`+`
	`3`	`+using namespace std;`
	`4`	`+`
	`5`	`+class Rectangle`
	`6`	`+{`
	`7`	`+ public:`
	`8`	`+ void area()`
	`9`	`+ {`
	`10`	`+ cout<<"Area function here"<<endl;`
	`11`	`+ }`
	`12`	`+};`
	`13`	`+`
	`14`	`+class Cuboid: public Rectangle`
	`15`	`+{`
	`16`	`+ public:`
	`17`	`+ void volume()`
	`18`	`+ {`
	`19`	`+ cout<<"Volume function here"<<endl;`
	`20`	`+ }`
	`21`	`+};`
	`22`	`+`
	`23`	`+`
	`24`	`+int main(void)`
	`25`	`+{`
	`26`	`+ //Rectangle r;`
	`27`	`+ //Cuboid *ptrc = &r; // this is not correct an object of type base does not know about all the extended functionality for the cuboid`
	`28`	`+ //ptrc ->area();`
	`29`	`+`
	`30`	`+ Cuboid c;`
	`31`	`+ Rectangle *ptrr = &c;`
	`32`	`+ ptrr->area();`
	`33`	`+ //ptrr->volume(); this pointer does not know about the volume() function , it expects to find a Rectangle where it is pointing to`
	`34`	`+`
	`35`	`+ return 0;`
	`36`	`+}`

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	`1`	`+#include <iostream>`
	`2`	`+`
	`3`	`+using namespace std;`
	`4`	`+`
	`5`	`+class BaseCar`
	`6`	`+{`
	`7`	`+ public:`
	`8`	`+ void start()`
	`9`	`+ {`
	`10`	`+ cout<<"Start car"<<endl;`
	`11`	`+ }`
	`12`	`+};`
	`13`	`+`
	`14`	`+class AdvancedCar: public BaseCar`
	`15`	`+{`
	`16`	`+ public:`
	`17`	`+ void playMusic()`
	`18`	`+ {`
	`19`	`+ cout<<"Play music"<<endl;`
	`20`	`+ }`
	`21`	`+};`
	`22`	`+`
	`23`	`+int main(void)`
	`24`	`+{`
	`25`	`+ AdvancedCar c;`
	`26`	`+ BaseCar *ptr=&c;`
	`27`	`+`
	`28`	`+ ptr->start();`
	`29`	`+ //ptr->playMusic();`
	`30`	`+`
	`31`	`+`
	`32`	`+ BaseCar car;`
	`33`	`+ //AdvancedCar *ptra = &car; // this can not be done`
	`34`	`+`
	`35`	`+ return 0;`
	`36`	`+}`

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