Answer / pratibha.v

class Swap
{
public static void main(String[] args)
{
int a,b,temp;
System.out.println("Enter the two nors\n");
a=Integer,parseInt(args[0]);
b=Integer.parseInt(args[1]);
System.out.println("Values of and b are"+a,+b);
temp=a+b;
System.out.println("temp=="+temp);
a==temp-b;
b==temp-a;
System.out.println("The value of a after Swapping are"+a);
System.out.println("The value of b after Swapping are"+b);
}
}

Answer / pradip kr singh

class Swap
{
public static void main(String[] args)
{
int a,b,temp;
a=Integer.parseInt(args[0]);
b=Integer.parseInt(args[1]);
System.out.println("Values of a and b are "+a+" , "+b);
temp=a+b;
System.out.println("temp=="+temp);
a=temp-a;
b=temp-b;
System.out.println("The value of a after Swapping are "+a);
System.out.println("The value of b after Swapping are "+b);
}
}

Answer / chirag

import java.io.*;
class swap
{
public static void main(String df[]) throws IOException
{
int a,b,temp;
BufferedReader c1=new BufferedReader(new
InputStreamReader(System.in));
System.out.println("Enter the 1st number:");
a=Integer.parseInt(c1.readLine());
System.out.println("Enter the 2nd number:");
b=Integer.parseInt(c1.readLine());
temp=a;
a=b;
b=temp;
System.out.println("after changing the values are:");
System.out.println("value of 1st number:"+a);
System.out.println("value of 2nd number:"+b);
}
}

Answer / purnachandrareddy

class Swap1
{
int a,b,temp;
void set(int x,int y)
{
a=x;
b=y;
System.out.println("enter the value of a= "+a);
System.out.println("enter the value of b="+b);
}
void change()
{
temp=a+b;
a=temp-a;
b=temp-b;
System.out.println("swap value of a= "+a);
System.out.println("swap value of b="+b);
}
}
class swap
{
public static void main(String[] args)
{
if(args.length != 2)
System.out.println("plz enter two values");
else
{
int x=Integer.parseInt(args[0]);
int y=Integer.parseInt(args[1]);
Swap1 s=new Swap1();
s.set(x,y);
s.change();
}
}
}

Answer / pratibha.v

class Swap
{
public static void main(String[] args)
{
int a,b,temp;
System.out.println("Enter the two nors\n");
a=Integer,parseInt(args[0]);
b=Integer.parseInt(args[1]);
System.out.println("Values of and b are"+a,+b);
temp=a+b;
System.out.println("temp=="+temp);
a==temp-a;
b==temp-b;
System.out.println("The value of a after Swapping are"+a);
System.out.println("The value of b after Swapping are"+b);
}
}

Answer / guindy friends

package Balu.vinoth.manic.Rama;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Pract {

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

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

System.out.println("Enter Prabhakaran salary:");
int firstValue = Integer.parseInt(br.readLine());

System.out.println("Enter Jeyamurugan salary:");
int secondValue = Integer.parseInt(br.readLine());

firstValue = firstValue + secondValue;

secondValue = firstValue - secondValue;
firstValue = firstValue - secondValue;

// After Swapping
System.out.println("Prabhakaran salary :" + firstValue);
System.out.println("Jeyamurugan salary :" + secondValue);

}

}

Answer / pradeep

class Swap1
{
int a,b;
void setNumbers(int x,int y)
{
a=x;
b=y;
System.out.println("values of a & b: "+a+", "+b);
}
void change()
{
a=a+b;
b=a-b;
a=a-b;
System.out.println("swap values of a & b: "+a+", "+b);
}
}
class swap
{
public static void main(String[] args)
{
if(args.length != 2)
System.out.println("plz enter two values");
else
{
int x=Integer.parseInt(args[0]);
int y=Integer.parseInt(args[1]);
Swap1 s=new Swap1();
s.set(x,y);
s.change();
}
}
}

Financial: credit card number validation) Credit card numbers follow certain patterns. A credit card number must have between 13 and 16 digits. It must start with: ■ 4 for Visa cards ■ 5 for Master cards ■ 37 for American Express cards ■ 6 for Discover cards In 1954, Hans Luhn of IBM proposed an algorithm for validating credit card numbers. The algorithm is useful to determine whether a card number is entered correctly or whether a credit card is scanned correctly by a scanner. All credit card numbers are generated following this validity check, commonly known as the Luhn check or the Mod 10 check, which can be described as follows (for illustration, consider the card number 4388576018402626): 1. Double every second digit from right to left. If doubling of a digit results in a two-digit number, add up the two digits to get a single-digit number. 2 * 2 = 4 2 * 2 = 4 4 * 2 = 8 1 * 2 = 2 6 * 2 = 12 (1 + 2 = 3) 5 * 2 = 10 (1 + 0 = 1) 8 * 2 = 16 (1 + 6 = 7) 4 * 2 = 8 2. Now add all single-digit numbers from Step 1. 4 + 4 + 8 + 2 + 3 + 1 + 7 + 8 = 37 3. Add all digits in the odd places from right to left in the card number. 6 + 6 + 0 + 8 + 0 + 7 + 8 + 3 = 38 4. Sum the results from Step 2 and Step 3. 37 + 38 = 75 5. If the result from Step 4 is divisible by 10, the card number is valid; otherwise, it is invalid. For example, the number 4388576018402626 is invalid, but the number 4388576018410707 is valid. Write a program that prompts the user to enter a credit card number as a long integer. Display whether the number is valid or invalid. Design your program to use the following methods: /** Return true if the card number is valid */ public static boolean isValid(long number) /** Get the result from Step 2 */ public static int sumOfDoubleEvenPlace(long number) /** Return this number if it is a single digit, otherwise, return * the sum of the two digits */ public static int getDigit(int number) /** Return sum of odd place digits in number */ public static int sumOfOddPlace(long number) /** Return true if the digit d is a prefix for number */ public static boolean prefixMatched(long number, int d) /** Return the number of digits in d */ public static int getSize(long d) /** Return the first k number of digits from number. If the * number of digits in number is less than k, return

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