Question

Write a Java program that reads four integers and prints "two pairs" if the input consists of two matching pairs (in some order) and "not two pairs" otherwise.

For example,

1 2 2 1 two pairs

1 2 2 3 not two pairs

2 2 2 2 two pairs

Answer 1

PROGRAM:

import java.util.*;
public class twopairs
{
public static void main(String[] args)
{
Scanner num = new Scanner(System.in);
System.out.println("Enter four numbers: ");
int p = num.nextInt();
int q = num.nextInt();
int r = num.nextInt();
int s = num.nextInt();

if((p==q && r == s)|| (p==r && q==s) || (r==q && p==s))
{
System.out.println(p+" "+q+" "+r+" "+s+" two pairs" );
}
else
{
System.out.println(p+" "+q+" "+r+" "+s+" not two pairs");
}
}
}

OUTPUT: