Question

• Question #2 Write a program that prints a nicely formatted table of the product of every pair of numbers in a given set of integer numbers. Your program reads two integer numbers x and y that represent the lower and upper bounds of the set, (?≤?x≤y), respectively. Then, for every pair of numbers in this set {?,?+1,?+2,…,?}{x,x+1,x+2,…,y}, your program should compute the product of the two numbers.

• Please note the following:
  1. Your program should read each input (lower bound and the upper bound) one at a time, and should make sure that each input is an integer. If not, it should prompt the user to re-enter a valid input.
  2. Once the two numbers are read, your program should validate that the lower bound is less than or equal to the upper bound. Otherwise, the input should be read again, starting from the lower bound.

Answer 1

Here's the program that prints the desired output as per the question :

Note:- As the programming environment is not mentioned I've used Java Programming language and Python for the above question, If you need this code in C, C++ please let me know in comments.

(IN Python)

print ("Enter lower and upper bounds :")
l=int(input())
u=int(input())
while l>u:
    print ("Incorrect bounds please re-enter :")
    print ("Enter lower and upper bounds :")
    l=int(input())
    u=int(input())
size=u-l+1
arr=[]
prdct=[]
a=l
for i in range(0,size):
    arr.append(a)
    a=a+1
for i in range (0,size):
    for j in range(0,size):
        prdct.append(arr[i]*arr[j])


print("Set of numbers are :")
for i in arr:
    print(i,end=" ")

print("\n Products of each pair are :")
for i in prdct:
    print(i,end=" ")

Output of above python program

(IN JAVA)

import java.util.*;
public class Main
{
        public static void main(String[] args) {
                System.out.println("Enter Lower and Upper bounds :");
                Scanner s=new Scanner(System.in);
                int l=s.nextInt();
                int u=s.nextInt();
                while(l>u)
                {System.out.println("\nIncorrect bounds please re-enter");
                 System.out.println("\nEnter Lower and Upper bounds :");
                 l=s.nextInt();
                 u=s.nextInt();
                  
                }
                int size=u-l+1;
                int []arr=new int [size];
                int []prdct= new int [size*size];
                int k=0;
                int a=l;
                for(int i=0;i<size;i++)
                {
                   arr[i]=a;
                   a++;
                }
                for(int i=0;i<size;i++)
                {
                    for(int j=0;j<size;j++)
                    {   
                        prdct[k]=arr[i]*arr[j];
                        k++;
                    }
                }
                System.out.println("Set of numbers are : ");
                for(int i=0;i<size;i++)
                System.out.print(" "+arr[i]);
                System.out.println();
                System.out.println("Product of pair are :" );
                for(int i=0;i<size*size;i++)
                System.out.print(" "+prdct[i]);
        }
}

It compiles and runs successfully and gives output as: