c++ program list

7/17/2019 c++ program list

http://slidepdf.com/reader/full/c-program-list-568c19b8cef8b 1/37

1

Program 1 //PROGRAM TO SHOW WORKING OF A BINARY FILE

#include<fstream>#include<iostream>#include<cstdlib>using namespace std;int read_file();int write_file();class student{

int roll_no,reg_no;char name[50];public:void input();void output();

};void student::input()

{ cout<<"Enter Registration Number: ";cin>>reg_no;cout<<"Enter Name: ";cin>>name;cout<<"Enter the Roll Number: ";cin>>roll_no;

}void student::output(){

cout<<"Registration Number: "<<reg_no<<endl;cout<<"Name: "<<name<<endl;

cout<<"Roll Number: "<<roll_no<<endl;}int main(){

write_file();cout<<"The Content of the File is: "<<endl;read_file();return 0;

}int write_file(){

student s1;

int loop;char file_name[50];cout<<"Enter the File Name: (without Spaces)";cin>>file_name;fstream ifile(file_name,ios::binary|ios::out);cout<<"How Many Records to be entered? : ";cin>>loop;for (int i=1; i<=loop; i++){

s1.input();ifile.write((char*)&s1,sizeof(s1));if (i!=loop)

{ cout<<"Enter Next Record-----------------"<<endl<<endl;}

}return 0;



2

}int read_file(){

system("cls");student s2;char file_name[50];

cout<<"Enter the name of file to be read:";cin>>file_name;fstream ofile(file_name,ios::binary|ios::in);while(ofile){

ofile.read((char*)&s2,sizeof(student));s2.output();

}return 0;

}

Output

Enter the File Name: (without Spaces)arfatHow Many Records to be entered? : 2

Enter Registration Number: 1000

Enter Name: arfat

Enter the Roll Number: 1

Enter Next Record-----------------


Enter Name: salman


The Content of the File is:

Enter the name of file to be read:arfatRegistration Number: 1000

Name: arfat

Roll Number: 1

Registration Number: 1001

Name: salman

Roll Number: 2


Name: salman

Roll Number: 2

Process returned 0 (0x0) execution time : 20.588 sPress any key to continue.



3

Program 2//DELETING RECORD FROM A BINARY FILE

#include<fstream>#include<iostream>#include<cstdlib>using namespace std;int read_file();int write_file();int delRecord();int copyToFile();class student{

int roll_no,reg_no;char name[50];char status;public:student()

{ status = 'A';}void input();void output();char getStatus(){

return status;}void del(){

status = 'D';

}int getRegNumber(){

return reg_no;}

};void student::input(){

cout<<"Enter Registration Number: ";cin>>reg_no;cout<<"Enter Name: ";cin>>name;

cout<<"Enter the Roll Number: ";cin>>roll_no;}void student::output(){

cout<<"Registration Number: "<<reg_no<<endl;cout<<"Name: "<<name<<endl;cout<<"Roll Number: "<<roll_no<<endl;cout<<"Status: "<<status<<endl;

}int main(){

write_file();read_file();delRecord();read_file();return 0;



4

}int write_file(){

student s1;int loop;char file_name[50]="stu.dat";

fstream ifile(file_name,ios::binary|ios::out);cout<<"How Many Records to be entered? : ";cin>>loop;for (int i=1; i<=loop; i++){

s1.input();ifile.write((char*)&s1,sizeof(s1));if (i!=loop){

cout<<"\nEnter Next Record-----------------"<<endl<<endl;}

}

return 0;}int read_file(){

system("cls");student s2;char file_name[50]="stu.dat";fstream ofile(file_name,ios::binary|ios::in);while(ofile){

ofile.read((char*)&s2,sizeof(student));s2.output();

}return 0;

}int delRecord(){

student s2;int temp_reg,cursor,counter=0,nbr;char ch;cout<<"Enter The reg number whose record you want to delete: ";cin>>temp_reg;fstream rfile("stu.dat",ios::binary|ios::out|ios::in);rfile.seekg(0,ios::end);

nbr=(rfile.tellg())/sizeof(student);rfile.seekg(0);while(rfile){

++counter;rfile.read((char*)&s2,sizeof(student));if (s2.getRegNumber()==temp_reg){

cursor = (counter-1)*sizeof(student);s2.output();cout<<"\nDo you want to Delete this record [y/n]: ";cin>>ch;

if (ch=='y'||ch=='Y'){

rfile.seekp(cursor,ios::beg);s2.del();rfile.write((char*)&s2,sizeof(student));



5

rfile.close();copyToFile();break;

}else{

cout<<"\nRecord Was not deleted. ";}}else if (counter = nbr){

cout<<"\nRecord Does not Exist.\n";}

}return 0;

}int copyToFile(){

student s3;fstream stu("stu.dat",ios::binary|ios::in);fstream temp("temp.dat",ios::binary|ios::out);while(stu){

stu.read((char*)&s3,sizeof(student));if (s3.getStatus()=='A'){

temp.write((char*)&s3,sizeof(student));}

}stu.close();

temp.close();remove("stu.dat");rename("temp.dat","stu.dat");return 0;

}

Output

Enter the File Name: (without Spaces)arfat

How Many Records to be entered? : 2


Enter Name: arfat


Enter Next Record-----------------


Enter Name: salman


The Content of the File is:

Enter the name of file to be read:arfat


Name: arfat

Roll Number: 1


Name: salman

Roll Number: 2

Enter The reg number whose record you want to delete:1001

Record Deleted.



6

Program 3//PROGRAM TO SHOW THE WORKING OF A LINKED LIST AS A QUEUE

#include<iostream.h>#include<conio.h>#include<process.h>#include<stdio.h>#include<string.h>struct node{char name[20];int age;node *link;}*ptr=NULL,*save=NULL;

class queue{node *rear,*front;public:queue()

{rear=NULL;front=NULL;}

void queins();void quedel();void display();}q;

void queue::queins(){ptr=new node;if(ptr==NULL){cout<<"Queue overflow ";}

else{cout<<"Enter the name ";gets(ptr->name);cout<<"Enter the age ";cin>>ptr->age;ptr->link=NULL;if(rear==NULL){rear=ptr;front=ptr;}else{rear->link=ptr;

rear=ptr;}}

}void queue::quedel(){if(rear==NULL){cout<<"Queue underflow ";}else{if(front==rear){save=front;front=NULL;

rear=NULL;cout<<"Name ";puts(save->name);cout<<"Age "<<save->age;delete save;



7

}else{save=front;front=front->link;cout<<"Name ";puts(save->name);

cout<<"Age "<<save->age;delete save;}

}}

void queue::display(){if(rear==NULL){cout<<"No elements ";}else{ptr=front;while(ptr!=NULL)

{cout<<"Name ";puts(ptr->name);cout<<"Age "<<ptr->age;ptr=ptr->link;}

}}

int main(){clrscr();int ch;

X:cout<<"\nEnter your choice\n1.Insert\n2.Delete\n3.Display\n4.Exit\n";cin>>ch;switch(ch){case 1:q.queins();

goto X;case 2:q.quedel();

goto X;case 3:q.display();

goto X;

case 4:exit(0);

default:cout<<"Wrong choice ";goto X;

}getch();}

OUTPUT

1.Insert

2.Delete

3.Display

4.Exit1

Enter the name Arfat

Enter the age 15



8

Enter your choice

1.Insert

2.Delete

3.Display

4.Exit

1

Enter the name parikshitEnter the age 18

Enter your choice

1.Insert

2.Delete

3.Display

4.Exit

1

Enter the name shalabh

Enter the age 17

Enter your choice

1.Insert

2.Delete

3.Display

4.Exit

2

Name krishna

Age 15

Enter your choice

1.Insert

2.Delete3.Display

4.Exit

3

Name parikshit

Age 18Name shalabh

Age 17



9

Program 4//PROGRAM TO SHOW THE WORKING OF A LINKED LIST AS STACK

#include<iostream.h>#include<conio.h>#include<process.h>#include<stdio.h>

struct node{char name[20];int age;node *link;}*ptr=NULL,*save=NULL;

class stack{node *top;public:stack(){top=NULL;}

void stackpush();void stackpop();void display();}st;

void stack::stackpush(){ptr=new node;if(ptr==NULL){cout<<"Overflow ";}

else{cout<<"Enter the name ";gets(ptr->name);cout<<"Enter the age ";cin>>ptr->age;ptr->link=NULL;if(top==NULL){top=ptr;}else{ptr->link=top;top=ptr;

}}}

void stack::stackpop(){if(top==NULL){cout<<"Underflow ";}else{save=top;top=top->link;cout<<"Name ";

puts(save->name);cout<<"Age "<<save->age;delete save;}

}



10

void stack::display(){if(top==NULL){cout<<"No elements.."<<endl;}else

{ptr=top;while(ptr!=NULL){cout<<"\nName ";

puts(ptr->name);cout<<"Age "<<ptr->age;ptr=ptr->link;}

}}

void main(){clrscr();

int ch;X:cout<<"\nEnter your choice\n1.Insert\n2.Delete\n3.Display\n4.Exit\n";cin>>ch;switch(ch){case 1:st.stackpush();

goto X;case 2:st.stackpop();

goto X;case 3:st.display();

goto X;default:cout<<"Wrong choice ";

goto X;case 4:exit(0);}

getch();}

OUTPUT

Enter your choice

1.Insert

2.Delete

3.Display

4.Exit1

Enter the name krishna

Enter the age 15

Enter your choice

1.Insert

2.Delete

3.Display

4.Exit

1

Enter the name parikshit

Enter the age 18

Enter your choice

1.Insert



11

2.Delete

3.Display

4.Exit

1

Enter the name shalabh

Enter the age 17

Enter your choice

1.Insert

2.Delete

3.Display

4.Exit

2

Name shalabh

Age 17

Enter your choice

1.Insert

2.Delete3.Display

4.Exit

3

Name parikshit

Age 18

Name krishna

Age 15

Enter your choice

1.Insert

2.Delete

3.Display4.Exit

4



12

Program 5//Binary Search - Ascending Sorted Array

#include <iostream>#include <cstdlib>

using namespace std;

class binarySearch {int a[30],choice,data;public:int insert();int display();int search();

};int binarySearch::insert(){

cout<<"Enter the Number of Elements: ";cin>>choice;cout<<"Enter the "<<choice<<" elements in Ascending Order: ";for(int i=0; i<choice; i++){

cin>>a[i];}return 0;

}int binarySearch::display(){

system("cls");

cout<<"The Array is :";for(int i=0; i<choice;i++){

cout<<a[i]<<" ";}return 0;

}int binarySearch::search(){

int low=0,mid,high=choice-1;cout<<"Enter the Element to be Searched : ";cin>>data;

while (low<=high){mid=(low+high)/2;if (a[mid]==data)return mid;else if(data > a[mid])low=mid+1;elsehigh=mid-1;

}return -1;

}

int main(){binarySearch ob;ob.insert();ob.display();



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int pos=ob.search();if (pos==-1)cout<<"Unsuccesful Search!!";elsecout<<"Element is at "<<pos;return 0;

}

Output

The Array is :2 3 4 5 6 Enter the Element to be Searched : 5

Element is at 3



14

Program 6//Linear Search in Unsorted Array


using namespace std;int search(int[],int,int);int main(){

int a[30],limit=30,choice,data,pos=0;cout<<"Enter the Limit of the Array (<=30): ";cin>>choice;if (choice<=30)

{cout<<"Enter the "<<choice<<" elements of the Array: ";for(int i=0; i<choice; i++)

{ cin>>a[i];}

system("cls");cout<<"The Given Array is : "<<endl;for(int j=0; j<choice; j++)

{cout<<a[j]<<" ";

}cout<<endl<<"Which element is to be searched: ";cin>>data;pos=search(a,choice,data);

if(pos==-1)cout<<"Search Unsuccessful!!";elsecout<<"The Element is at "<<pos;

}else

{cout<<"Array Overflow!!";

}return 0;

}int search(int a[],int limit,int data)

{ for (int i=0; i<limit;i++){

if(a[i]==data)return i;

}return -1;

}

Output

The Given Array is :

1 2 3 4 5

Which element is to be searched: 4

The Element is at 3

Process returned 0 (0x0) execution time : 16.691 s

Press any key to continue.



15

Program 7// List of Armstrong Number

#include <iostream>using namespace std;int main(){

cout<<"Generating Armstrong Number upto Given Limit\n";int num,sum=0,r,temp;cout<<"Enter the Limit\n";cin>>num;for(int i=0; i<=num; i++)

{temp=i;while(temp!=0){

r=temp%10;

sum=sum+(r*r*r);temp=temp/10;}if(sum==i)cout<<endl<<i<<" is armstrong";sum=0;

}return 0;

}

Output

Generating Armstrong Number upto Given Limit

Enter the Limit

500

0 is armstrong

1 is armstrong

153 is armstrong

370 is armstrong

371 is armstrong

407 is armstrong




16

Program 8//Perfect Numbers#include <iostream>


int main(){

int low,upp,temp,track=0,sum=0;float loop=0.0;cout<<"Program to find the Perfect Numbers Withing Given Limits\n";cout<<"Enter the Lower Limit: ";cin>>low;cout<<"Enter the upper Limit: ";cin>>upp;cout<<endl;for (int i=low;i<=upp;i++)

{ temp=i;loop++;for (int j=1; j<i; j++){

if (temp%j==0){

loop++;sum=sum+j;

}}if (sum==temp)

{ cout<<temp<<" is a perfect square\n";}sum=0;

}cout<<"\nThe Loop ran "<<loop<<" times\n";return 0;

}

Output

Program to find the Perfect Numbers Withing Given Limits

Enter the Lower Limit: 1

Enter the upper Limit: 200

6 is a perfect square

28 is a perfect square

The Loop ran 1098 times





17

Program 9//Prime Numbers#include <iostream>


int main(){

int num,temp,flag=0,track=0;cout<<"Enter the Limit upto which Prime Numbers are to be found: ";cin>>num;for(int i=1; i<=num; i++)

{temp=i;for (int j=1; j<=i; j++){

if (temp%j==0)

{ flag++;}

}if (flag==2)cout<<endl<<"The "<<++track<<"th Prime Number is "<<i;flag=0;

}cout<<endl<<"\nThere are "<<track<<" Prime Numbers between 1 and

"<<num<<"\n";return 0;

}

OutputEnter the Limit upto which Prime Numbers are to be found: 500

The 1th Prime Number is 2








The 9th Prime Number is 23The 10th Prime Number is 29
















18





















































19
















There are 95 Prime Numbers between 1 and 500





20

Program 10//Pythagorean Triplets#include <iostream>


int main(){

int low,upp,temp,track=0;float loop=0.0;cout<<"Program to find the Pythagorean Triplets Withing Given Range\n";cout<<"Enter the Lower Limit: ";cin>>low;cout<<"Enter the upper Limit: ";cin>>upp;for(int i=low; i<=upp; i++)

{

temp=i;loop++;for (int j=1;j<i;j++){

loop++;for (int k=1;k<i;k++){

if ((i*i)==(j*j)+(k*k) && (i==(j+1)) && (j==(k+1))){

cout<<i<<'\t'<<j<<'\t'<<k<<endl;loop++;track++;

}

}}

}cout<<"there are "<<track<<" pythagorean triplets\n";cout<<"The loop ran "<<loop<<" times";

return 0;}

Output

Program to find the Pythagorean Triplets Withing Given Range

Enter the Lower Limit: 1Enter the upper Limit: 200

5 4 3

there are 1 pythagorean triplets

The loop ran 20101 times





21

Program 11//Prime Factors of an Integer#include <iostream>


int main(){

int num,temp,flag=0,dummy,loop=0,count=0;cout<<"Enter the Number for Finding the Prime Factor: \n";cin>>num;dummy=num;for(int i=1; i<=num; i++)

{temp=i;loop++;for (int j=1; j<=i; j++)

{ if (temp%j==0){

flag++;loop++;

}}if (flag==2){while(dummy%i==0){

cout<<i<<'\n';

count++;loop++;dummy=dummy/i;

}}flag=0;

}cout<<"\nThere are "<<count<<" Prime Factors of "<<num<<"\n";cout<<"\nThe loop Ran "<<loop<<" times.";

return 0;}

Output

Enter the Number for Finding the Prime Factor:210

2

3

5

7

There are 4 Prime Factors of 210

The loop Ran 1380 times.



22

Program 12//Traversig an Array and find the sum of all in the Array.


using namespace std;int sum(int[],int);int main(){

int a[30],limit=30,choice;cout<<"Enter the Limit of the Array (<=30): ";cin>>choice;if (choice<=30)

{cout<<"Enter the "<<choice<<" elements of the Array: ";for(int i=0; i<choice; i++)

{ cin>>a[i];}

system("cls");cout<<"The Given Array is : ";for(int j=0; j<choice; j++)

{cout<<a[j]<<" ";

}cout<<endl<<"The Sum of the Array is : "<<sum(a,choice);

}else

{ cout<<"Array Overflow!!";}

return 0;}int sum(int a[],int limit){

int sum=0;for(int i=0; i<limit; i++){

sum+=a[i];}

return sum;}

Output

The Given Array is : 3 4 5 6 7

The Sum of the Array is : 25





23

Program 13//Linked List#include <iostream>using namespace std;

struct node{int info;node *next;

};class link_list{

private:node *start;

public:link_list(){

start=NULL;}

void add_data(int data){node *new_node=new node;new_node->info=data;new_node->next=start;start=new_node;

}void display(){

node *ptr=start;node *temp;cout<<"->";

while(ptr){cout<<ptr->info<<"->";temp=ptr;ptr=ptr->next;delete temp;

}}

};int main(){

link_list link;

int value;char choice;while(1){

cout<<"\nDo you wish to insert new node: [y/n]";cin>>choice;if (choice=='y' || choice=='Y'){

cout<<"\nEnter the info of node:";cin>>value;link.add_data(value);

}

elsebreak;}cout<<"\nThe Linked List is: ";link.display();



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}

Output

Do you wish to insert new node: [y/n]y

Enter the info of node:4





Do you wish to insert new node: [y/n]n

The Linked List is: ->3->3->4->





25

Program 14//Palindrome Number#include <iostream>#include<stdio.h>#include<stdlib.h>using namespace std;

int main(){

int a,b,c,r=0;System("cls");cout<<"Enter the Number:";cin>>a;b=a;for(int i=0; b!=0; i++){

c=b%10;

r=(r*10)+c;b=b/10;

}if(r==a)

cout<<endl<<"The Number is Palindrome.";else

cout<<endl<<"The Number Is Not Palindrome.";

return 0;

}

OUTPUTEnter the Number: 262

The Number is Palindrome.

Enter the Number: 134

The Number Is Not Palindrome.



26

Program 15

//Sum of N Natural Numbers

#include <iostream>#include<stdio.h>#include<stdlib.h>using namespace std;int sum(int,int);int main(){

system("cls");int start,end,num;cout<<endl<<"Program to Find the Sum of n Natural Numbers From a Given

Number.";cout<<endl<<"Enter the Starting Number: ";cin>>start;cout<<endl<<"Enter the Ending Number: ";

cin>>end;num=sum(start,end);cout<<endl<<"The Sum from "<<start<<" till "<<end<<" is "<<num;return 0;

}int sum(int a, int b){

int sum;sum=((b*(b+1))/2)-(((a-1)*a)/2);return sum;

}

OUTPUT

Program to Find the Sum of n Natural Numbers From a Given Number.Enter the Starting Number: 3

Enter the Ending Number: 12

The Sum from 3 till 12 is 75



27

Program 16 // Program to Count the Number of words Present in a Line

#include <iostream>#include<stdio.h>#include<stdio.h>using namespace std;

int count(char[]);int main(){

int a;char ch[80];cout<<endl<<"Program to Count the Number of words Present in a Line.";cout<<endl<<"Enter the String.";gets(ch);a=count(ch);

cout<<"The Number of Words are "<<a;return 0;}int count(char str[]){

int b=1;for(int i=0; str[i]!=NULL; i++){

if (str[i]==' ')b++;

}return b;

}OUTPUT

Program to Count the Number of words Present in a Line.

Enter the String. India is a Great country.

The Number of Words are 5



28

Program 17 //Interactive Pattern Printing

#include <iostream>#include<stdio.h>#include<stdlib.h>#include<iomanip>int main(){

cout<<"Interactive pattern Printing";int rows;char ch;cout<<endl;do{

cout<<"How Many Rows: ";cin>>rows;

system("cls");if (rows>=1 && rows<=24){

int a=1,b=2*rows-1;for(int i=1; i<=rows; i++){

for (int j=1; j<=i; j++){

cout<<setw(a)<<"*";++a;cout<<setw(b)<<"*";b-=2;

}cout<<endl;}a=rows,b=1;for(int k=1; k<=rows; k++){

for(int j=0; j<=k; j++){

cout<<setw(a)<<"*";--a;cout<<setw(b)<<"*";b+=2;

}cout<<endl;}cout<<"Want to continue:";cin>>ch;

}else{

cout<<endl<<"You have entered "<<rows<<" rows which is more thanthe screen can show";

cout<<endl<<"Press Y to Try Again";cin>>ch;

}}while (ch=='Y' || ch=='y');return 0;

}



29

OUTPUT

How Many Rows:2

* *

*

* *



30

Program 18 //Position of A Character Finder

#include <iostream>#include<stdio.h>#include<stdlib.h>#include<iomanip>using namespace std;int main(){char a[10],ch;int z=0; b[5]={0,0,0,0,0},x=0;cout<<"Enter String";gets(a);cout<<endl<<"Enter the Character: ";cin>>ch;for(int i=0; a[i]!=NULL; i++)

{if (a[i]==int(ch)){b[z]=i;z++;}}cout<<"The Position of"<<ch<<" is at ";for(int k=0; k=z-2; k++){cout<<b[i]<<"th";++x;

}cout<<b[x]<<"th";cout<<"and "<<b[++x]<<"th position";return 0;}

OUTPUT

Enter String: Arfat Salman

Enter the Character: A

The Position of A is at 1th position.



31

Program 19

//Vertical Sentence Printing#include <iostream>#include<stdio.h>#include<stdlib.h>#include<iomanip>using namespace std;int main(){

char a[100],ch;cout<<"Program to Print Vertical Words"<<endl;cout<<"Enter String:";gets(a);cout<<endl;

cout<<”Vertical Words Are:”; for(int i=0; a[i]!=NULL; i++){

if (a[i]==' ')cout<<endl;elsecout<<a[i];

}return 0;

}

OUTPUT

Program to Print Vertical Words

Enter String: India is a Great country

Vertical Words Are:

India

Is

A

Great

Country



32

Program 20

//Demonstration of Function Overloading

#include <iostream>#include<stdio.h>#include<stdlib.h>#include<iomanip>using namespace std;int print(char,int);int print(int,int);int main(){

cout<<"Function Overloading";cout<<endl;print('*',5);print(10,5);return 0;

}int print(char a, int b){

for(int i=1; i<=b; i++)cout<<endl<<a;return 0;

}int print (int x, int y){

for(int i=1; i<=y; i++)cout<<endl<<x;return 0;

}OUTPUT

Function Overloading

*

*

*

*

*

10

1010

10

10



33

Program 21//Largest and Smallest Among the Arrays

#include <iostream>#include<stdio.h>#include<stdlib.h>#include<iomanip>using namespace std;int main(){

int v[50],large,small,i,n;cout<<endl<<"How Many Element";cin>>n;cout<<endl<<"Enter values";for( i=0; i<n; i++)cin>>v[i];large=v[1];

small=v[1];for (int j=0; j<n; j++){

if (v[j]>large)large=v[j];else if(v[j]<small)small=v[j];

}cout<<endl<<"The Largest Element is:"<<large;cout<<"The Smallest Element is:"<<small;return 0;

}OUTPUT

How Many Element5

Enter values

21

32

43

54

67

The Largest Element is:67

The Smallest Element is:21



34

Program 22 //Exponentiation#include <iostream>#include<stdio.h>#include<stdlib.h>#include<string.h>using namespace std;double power(double,double);int main(){

int a,b,c;double d=0;cout<<endl<<"Enter Base:";cin>>a;cout<<"Enter Exponent:";cin>>b;d=power(a,b);

cout<<a<<" raised to "<<b<<" is equal to "<<d;return 0;}double power(double base, double exp){

double c=1;for(int i=1; i<=exp; i++)c=c*base;return c;

}

OUTPUT

Enter Base: 5

Enter Exponent: 5

5 raised to 5 is equal to 3125.



35

Program 23

//Factorial of A Number#include <iostream>#include<stdio.h>#include<stdlib.h>#include<string.h>using namespace std;int main(){

int a,b;double d=1;cout<<endl<<"Enter up which Number factorial has to Calculated:";cin>>a;for (int j=1; j<=a; j++)d=d*j;for (int i=1; i<=a; i++){

if (i==a)cout<<i;elsecout<<i<<"*";

}cout<<"="<<d;return 0;

}

OUTPUT

Enter up which Number factorial has to Calculated: 8

1*2*3*4*5*6*7*8=40320



36

Program 24

// Dynamic Memory Allocation#include<iostream>using namespace std;int *empno=NULL;int *salary=NULL;int main(){

int size;cout<<"\nHow Many employees are there? :";cin>>size;empno=new int[size];salary=new int[size];for(int i=0; i<size; i++){

cout<<"Enter EMPNO and Salary: ";cin>>empno[i]>>salary[i];

}cout<<"You have Entered \n";cout<<"\tEmpno\t\tSalary\n\n";for(int j=0; j<size; j++){

cout<<"\t"<<empno[j]<<"\t\t"<<salary[j]<<"\n";}delete empno;delete salary;

}

Output

How Many employees are there? :3Enter EMPNO and Salary: 101

2000

Enter EMPNO and Salary: 102

3000

Enter EMPNO and Salary: 103

4000

You have Entered

Empno Salary

101 2000

102 3000103 4000





37

Program 25

//PROGRAM FOR MAINTAINING A LIBRARY CLASS

#include<iostream.h>#include<conio.h>#include<stdio.h>class library { char bookname[30];

char author[30] ;int price;public: void input(void);void output(void);};

void library::input(){ cout<<"Enter bookname:" ;gets(bookname);cout<<"Enter author name:" ;gets(author);

cout<<"Enter price: Rs." ;cin>>price;}void library::output(void){ cout<<bookname;cout<<"\n"<<author;cout<<"\nRs. "<<price;

}void main(){ clrscr();library b1,b2,b3 ;// for(i=1;1<=num;i++)

// cout<<"Enter information for book1:"<<endl;// b1.input();cout<<"Enter information for book1:"<<endl;b1.input();cout<<"You entered for book1:"<<endl;b1.output();cout<<"\nEnter information for book2:"<<endl;b2.input();cout<<"You entered for book2:"<<endl;b2.output();getch();}

OUTPUT

Enter information for book1:

Enter bookname:India My pride

Enter author name:Arfat

Enter price: Rs.100

You entered for book1:

India My pride

Krishna

Rs. 100

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