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diff between Abstract class Interfaces?
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Answer / anu mehra
abstract classes contain
1)abstract as well as non abstract method
2) to inherit we use extends keyword
Interface
1) all methods are abstract ,public and static
2) all variables are public , static and final
3) to inherit we use implements keyword
4) interface can extend another interface
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / pramod kumar sharma
abstract class contains the at list one abstract methods and abstract methods contain the only declaration but no definition.
interface contain all methods abstract methods only.
| Is This Answer Correct ? | 2 Yes | 2 No |
Answer / dhanya
Any class with one or more abstract method is called an abstract class.It can have data attributes,concrete methods and constructors.Abstract class can differ the implementation
by declaring the method to be abstract,and a Java interface declares only the contract and no implementation.All methods declared in interface are public and abstract.All attributes are public,static and final.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / latha
abstract class contains the abstract methods. these methods
contain the only declaration but no definition.
interface is the class which extends the many interfaces.
and the class implements the many interfaces
| Is This Answer Correct ? | 1 Yes | 4 No |
#include <stdio.h> #include <alloc.h> #include <stdlib.h> #include <conio.h> 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.
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