Write a class to represent a vector (1 - D Numeric array). Include member functions :

*   for vector creation.

*   for modification of a given element

*   for displaying the largest value in the vector

*   for displaying the entire vector

*   Write a program using this class.

#include<iostream.h>

#include<conio.h>

class vec

{

int arr[10];

public :

vec() // default constructor

{

for(int i = 0 ; i < 10 ; i++)

 arr[i] = 0;

}

vec(int a[])  // parameterised constructor

{

for(int i=0; i < 10 ; i++ )

{

arr[i] = a[i];

}

}

~vec()  // destructor

{

delete arr;

}

void  crea()

{

for(int i=0; i < 10 ; i++ )

{

cout << "\n Enter an element : ";

cin >> arr[i];

}

}

void modi(int pos, int ele)

{

arr[pos] = ele;

}

void disp()

{

cout<< "\n The elements of the array --> ";

for(int i = 0; i<10; i ++)

{

cout<< arr[i] << " ";

}

}

int disp_lar()

{

int lar = arr[0];

for(int i =1; i < 10 ; i++)

{

if ( lar < arr[i] )

{ lar = arr[i];

}

}

return lar;

}

}; // end of class

void main()

{

vec v1; // object v1 is created using default cons

v1.crea();

v1.disp();

int max = v1.disp_lar();

cout<< "\n The max element in the array is " << max;

cout<<"\n\n Enter 1 for modifying the array element :";

cout<<"\n Enter 2 for not modifying the array :";

int ch, ps, el;

cout<< "\n Enter your choice :";

while(ch == 1)

{

cout<< "\n Enter the position to be changed";

cin>>ps;

cout<< "\n Enter the element to be entered ";

cin >> el;

v1.modi(ps, el);

cout<< "\n Enter your choice :(1 or 2 )";

cin >> ch;

}

cout<< "\n The elements after modification ";

v1.disp();

cout<< "\n The Max element is ";

max = v1.dis_lar();

cout << max ;

getch();

}

Declare a class to represent fixed-deposit account of 10 customers with the following data members: Name of the depositor, Account Number, Time Period ( 1 or 3 or 5 yrs), Amount. The class also contains following member functions : (A) To initialise data members. , (B) For withdrawal of money (after half or the time period has passed ). , (C) To display the data members. Write a program to handle 10 account holders. Make necessary changes in the class definition - if required.

#include<iostream.h>

#include<conio.h>

#include<string.h>

#include<stdio.h>

class account

{

private:

char name[20];

long acno;

int time;

double amount;

public :

void get_data( char nm[], long n, double am)

{

strcpy(name, nm);

acno = n;

time  = 1;

cout<< "\n Enter Duration ( for 3 yrs / 5 yrs) ..... \n else duration will be considered as 1 yr. ";
int t;
cin>> t;
if(t == 3 || t == 5)
  time = t;

amount = am;

}

void withdrw()

{

cout<< "\n Enter the time period,that has passed after creating new fixed-deposit A/c :"

int a;
cin>>a;

cout<< "\n The amount to be drawn :";

double d;

cin>>d;

if(a > = time/2)

   {

    if(d <= amount) 

         amount = amount - d;

     else

         cout<<"\n Balance is less in your account.Abort !";

    }

else

         cout<<"\n Money can not be withdrawn. For details contact helpline.";

}

void display()

{

cout<< "A/C No." << "\t" << "Name " << "\t\t" << "Amount" << "\n\n";

cout << acno << "\t" << name << "\t\t" << amount << "\n\n";

}

void display_time()

{

cout<< "\n A/c Duration = " << time << "yrs";

}

};

void main()

{

account customer[10];

char ch= 'y';

char nam[20];

long acn;

double amt;

/* Input 10 customer's details  */

for(int i = 0; i < 10 ; i++)

{

cout<< "\n Do you want to create a new account. Minimum duration is 1 yr":

cout<< "Enter (y /n) :";

cin >> ch;

if(tolower(ch) ! = 'y')
          { i--;

            continue;
          }

cout<< "\n Enter name :";

gets(nam) ;

cout<< "\n Enter A/c No. ";

cin>> acn;

cout<< "\n Enter amount ";

cin>> amt;

customer[i].get_data(nam, acn, amt);

}

/* Display 10 customer's details */

for(i = 0; i<10; i++)

{

customer[i].display();

}

/* withdraw money */

cout<< "\n************** Do you Withdraw Money ........\n";

cout<< "\n You can withdraw money only when, after creating your A/c ,half of the time period has passed . ";

cout<< "\n Enter A/c No.";

cin>>acn;

for(i = 0 ; i <10 ; i++)

{

if (acn == customer[i].acno)

      customer[i].withdrw();

}

 

/* Display 10 customer's details */

for(i = 0; i<10; i++)

{

customer[i].display();

}

getch();

}

Write a C++ program to implement a circle class. Each Object of this class will represent a circle, storing its radius and the x and y coordinate of its center as floats. Include two access functions for: (a) Calculate area of circle , (b) calculating the circumference of circle.

#include<iostream.h>

#include<conio.h>

// start class

class circle

{

private :

float radius;

float x , y;

public :

void get_radius(float r)

{ radius = r; }

void get_xycoor(float a, float b)

{ x = a;

y = b;

}

void area( )

{

cout<< "\n\n The area of the circle of radius "<< radius <<" is " << 3.14 * radius * radius ;

}

void circum()

{

cout<< "\n\n The circumference of the circle of radius "<< radius <<" is " << 2 *3.14 * radius ;

}

};

//End of class

void main()

{

circle c1;

float rad;

cout<< "\n Enter radius :";

cin >> rad;

c1.get_radius(rad);

c1.area();

c1.circum();

getch();

}