Answer Posted / varun sir

a virtual function is used to avoid duplicacy in derived
classes. suppose that there is a base class which has two
properties a and b. now suppose that two derived classes
named 'der1' and 'der2' are deriving from that base class,
then both properties a and b of base class will be
inherited to both of the derived classes. now if a new
class is derived from 'der1' and 'der2' then both of the
properties a and b of 'der1' and 'der2' will also be
inherited into newly derived class. this will cause
duplicacy in newly obtained derived class. so in order to
avoid this duplicacy , we use virtual functions.

Why do we use inheritance?

1116

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1041

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What causes polymorphism?

1131

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How can you overcome the diamond problem in inheritance?

1180

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#include #include #include #include void insert(struct btreenode **, int); void inorder(struct btreenode *); struct btreenode { struct btreenode *leftchild; struct btreenode *rightchild; int data; }; main() { struct btreenode *bt; bt=(struct btreenode *)NULL; int req,i=1,num; clrscr(); printf("Enter number of nodes"); scanf("%d",&req); while(i<=req) { printf("Enter element"); scanf("%d",&num); insert(&bt,num); i++; } inorder(bt); } void insert(struct btreenode **sr, int num) { if(*sr==NULL) { *sr=(struct btreenode *)malloc (sizeof(struct btreenode)); (*sr)->leftchild=(struct btreenode *)NULL; (*sr)->rightchild=(struct btreenode *)NULL; (*sr)->data=num; return; } else { if(num < (*sr)->data) insert(&(*sr)->leftchild,num); else insert(&(*sr)->rightchild,num); } return; } void inorder(struct btreenode *sr) { if(sr!=(struct btreenode *)NULL) { inorder(sr->leftchild); printf("\n %d",sr->data); inorder(sr->rightchild); } else return; } please Modify the given program and add two methods for post order and pre order traversals.

3758

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1106

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Will I be able to get a picture in D drive to the c++ program? If so, help me out?

2195

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1300

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1033

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What is the difference between inheritance and polymorphism?

1110

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What is oops in simple words?

1089

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what is difference between class template and template class?

2659

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What is pure oop?

1103

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What polymorphism means?

1074

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What is abstraction with example?

1112

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