Chapter 2 Program Solution(Control Structure & Classes)

8/6/2019 Chapter 2 Program Solution(Control Structure & Classes)

1/14

QUESTIONS BANK (CP-II) Compiled by : Prof. Deepak Gaikar

CHAPTER 2 : Control Structure Introducing Classes

Program Questions

1 Write a program to determine the sum of the series for a given value of n.

1+1/2+1/3+ 1/n

Sol:

class P21

{

public static void main(String args[])

{

int n;

float temp,sum=0.0F;

// creating object of class DataInputStream.

DataInputStream in = new DataInputStream(System.in);

System.out.println("Harmonic series : 1 + 1/2 + 1/3 + ......+

1/n \n ");

try

{

System.out.print(" Enter a number : ");

n = Integer.parseInt(in.readLine( ));

for(int i=0;i


2/14

QUESTIONS BANK (CP-II) ( Using java) Compiled by : Prof. Deepak Gaikar

{

int i , n , r , P , C ;

int factorial , temp , result ;

n = 6; r=3;

for (i=1,factorial=1 ; i


3/14


{

public static void main(String args[])

{

int ch,i,j,in=1;

for(i=1;i


4/14


{

for(int j=1; j


5/14


while(n>1)

{

fact=fact*n;

n-=1;

}

System.out.println("Factorial ="+fact);

}

else

{

System.out.println("n must be zero or greater");

}

}

}

/*

Enter any Number : 5

Factorial =120

*/

6 write a program that reads a 4 digit integer and breaks it in a sequence of individual

digits e.g. 1691 should be displayed as 1691

Solution:

import java.io.*;

class digit

{

public static void main(String args[])throws IOException

{

int quotient,divident,divisor;divisor=1000;

DataInputStream br = new DataInputStream(System.in);

System.out.println("Enter a 4 digit no.: ");

divident=Integer.parseInt(br.readLine());

while(divident>0)

{

quotient=divident/divisor;

System.out.print(quotient+"\t");


6/14


divident=divident%divisor;

divisor= divisor/10;

}

}

}

o/p:Enter a 4 digit no.:1691

1 6 9 1

7 write a program to display the following pattern

1

0 1

1 0 1

0 1 0 1

1 0 1 0 1

Solution:

class pattern

{

public static void main(String arg[])

{int i,j;

for( i=1; i=1; j--)

{

System.out.print(j%2+" ");

}

System.out.println();

}

}

}


7/14


8 WAP and check with it is Armstrong number?

import java.io.*;

class AMSTRONG

{

public static void main(String args[])throws Exception

{

int n,r,t,s=0;

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

System.out.println("enter value of n");

n=Integer.parseInt(br.readLine());

t=n;

for(;n>0;)

{

r=n%10;

s=s+r*r*r;

n=n/10;

}

if(s==t)

System.out.println("amstrong number");

else

System.out.println("NOT amstrong number");

}

}

o/p

enter value of n 153

amstrong number

9 Write a program to generate Fibonacci series.

Solution:

import java.io.*;


8/14


class fibo

{

public static void main(String args[])throws IOException

{

int a=0, b=1, c;


System.out.println("Enter the no of Fibonacci term to be printed.: ");

int n=Integer.parseInt(br.readLine());

for(int i=1; i


9/14


i=2;

while(i


10/14


System.out.println("ODD");

}

catch(Exception e)

{

System.out.println("Error in Output/Input Stream");

}

}

}

12 write a program to determine the sum of the series:

1-1/2+1/3-1/4+..+1/n

Take value of n from the user.

Solution :

import java.io.*;

class series3

{

public static void main(String arg[])throws IOException

{

DataInputStream br= new DataInputStream(System.in);

int a=1,z=1; // m= 1 (say)

float s=0f;

System.out.println("Enter the value of n.: ");


for(int i=1;i


11/14


}

}

o/p

Enter the value of n.:3

Sum of the Series =0.83333

-------------********---------

or simillarly

/*

import java.io.*;

class series3

{

public static void main(String arg[])

{

try

{


int m=1;

double sum=0;



for(double i=1; i


12/14


System.out.println("Error in Output/Input Stream");

}

}

}

*/13 s=1/1-1/3+1/5-1/7+1/9............+n times find sum of series

Solution:

import java.io.*;

class series1

{


{


int a=1,z=1;

float s=0f;



for(int i=1;i


13/14


14 s=1/3+5/5+9/7 +13/9++n times

Solution:

import java.io.*;

class series2

{


{


int a=1,b=3;

float s=0f;



for(int i=1;i


14/14


int t=1;

double s,s0=0, v0=0,a=0;

DataInputStream in=new DataInputStream(System.in);

System.out.print("\nEnter value of a : ");

a=Integer.parseInt(in.readLine());

s=s0+v0*t+1.0/2*a*t*t;

System.out.println("When t = "+t+" Distance travelled by the Object = "+s);

//this for loop will calculate distance s at time t=5,10,15,20,.....,100.

for(t=5; t

Documents

Chapter 2 Program Solution(Control Structure & Classes)