Array insertion Deletion program

Array insertion Deletion program(edited by swapnil)

 #include<iostream>

using namespace std;

class array

{

int a[30], n;

public:

void input()

{

cout<<"Enter the length: ";

cin>>n;

cout<<"Enter a value for the array "<<endl;

for(int i=0; i<n; i++)

cin>>a[i];

}

void insert_begin()

{

int value;

cout<<"Enter a value for insertion at the front "<<endl;

cin>>value;

n=n+1;

for(int i=n-1; i>=1; i--)

{

a[i]=a[i-1];

}

a[0]=value;

}

void insert_end()

{

int value;

cout<<"Enter a value for insertion at the end "<<endl;

cin>>value;

n=n+1;

a[n-1]=value;

}

void insert_position()

{

int pos;

cout<<"Enter the position "<<endl;

cin>>pos;

int value;

cout<<"Enter the value "<<endl;

cin>>value;

for(int i=n-1; i>=pos; i--)

{

a[i]=a[i-1];

}

a[pos-1]=value;

}

void display()

{

cout<<"The value of array "<<endl;

for(int i=0; i<n; i++)

cout<<a[i]<<" ";

cout<<endl;

}

void delete_begin()

{

int value;

value=a[0];

cout<<"The deleted value is "<<value<<endl;

for(int i=1; i<=n-1; i++)

{

a[i-1]=a[i];

}

n=n-1;

}

void delete_end()

{

int value;

value=a[n-1];

cout<<"The deleted value is "<<value<<endl;

n=n-1;

}

void delete_position()

{

int value, pos;

cout<<"Enter position "<<endl;

cin>>pos;

value=a[pos-1];

cout<<"The deleted value is "<<value<<endl;

for(int i=pos; i<=n-1; i++)

{

a[i-1]=a[i];

}

n=n-1;

}

};

int main()

{

array ob;

ob.input();

while(1)

{

cout<<"Enter 1 for displaying array "<<endl;

cout<<"Enter 2 for inserting element at the front "<<endl;

cout<<"Enter 3 for inserting element at the end "<<endl;

cout<<"Enter 4 for inserting element at the given position "<<endl;

cout<<"Enter 5 for deleting element from the front "<<endl;

cout<<"Enter 6 for deleting element from the end "<<endl;

cout<<"Enter 7 for deleting element from a given position "<<endl;

cout<<"Enter 8 for exit "<<endl;

int choice;

cin>>choice;

switch(choice)

{

case 1:

ob.display();

break;

case 2:

cout<<"\nValue before insertion\n";

ob.display();

ob.insert_begin();

cout<<"\nValue after insertion\n";

ob.display();

break;

case 3:

cout<<"\nValue before insertion\n";

ob.display();

ob.insert_end();

cout<<"\nValue after insertion\n";

ob.display();

break;

case 4:

cout<<"\nValue before insertion\n";

ob.display();

ob.insert_position();

cout<<"\nValue after insertion\n";

ob.display();

break;

case 5:

cout<<"\nValue before deletion\n";

ob.display();

ob.delete_begin();

cout<<"\nValue after deletion\n";

ob.display();

break;

case 6:

cout<<"\nValue before deletion\n";

ob.display();

ob.delete_end();

cout<<"\nValue after deletion\n";

ob.display();

break;

case 7:

cout<<"\nValue before deletion\n";

ob.display();

ob.delete_position();

cout<<"\nValue after deletion\n";

ob.display();

break;

case 8:

cout<<"Exit from program";

break;

default:

cout<<"Enter a valid choice\n";

}

if(choice==8)

break;

}

return 0;

}