Problem Instructions Write a program that allows a user to input up to 20 intege

Question

Problem Instructions

Write a program that allows a user to input up to 20 integers. First ask the user how many numbers (num), up to 20, they wish to enter. Then prompt the user for num numbers, storing them in an array. Finally print the numbers in reverse, separated by a comma and a single space, on a single line.

You should declare an array:

int numbers[20];
but use num to keep track of how many valid entries you have.

Constraints

Do not output a comma after the last number.
If the user enters an invalid number of entries, prompt them to try again.
Examples:

How many numbers will you be entering (up to 20): 5
Enter a number: 3
Enter a number: 5
Enter a number: 8
Enter a number: 300
Enter a number: 12
Numbers in reverse: 12, 300, 8, 5, 3
How many numbers will you be entering (up to 20): 50
Try again (valid numbers are 1-20): 5
Enter a number: 3
Enter a number: 5
Enter a number: 8
Enter a number: 300
Enter a number: 12
Numbers in reverse: 12, 300, 8, 5, 3

in C++ format

Explanation / Answer

#include <iostream>

using namespace std;

int main()

{

   //LOCAL DECLARATIONS

   int numbers[20];

   int num;

   //PROCEDURES

   cout << "How many numbers will you be entering (up to 20): ";

   cin >> num;

   cin.ignore();

   while (num > 20 || num < 1)

   {

      cout << "Try again (valid numbers are 1-20): ";

      cin >> num;

      cin.ignore();

   }

   for (int i = 0; i < num; i++)

   {

      cout << "Enter a number: ";

      cin >> numbers[i];

      cin.ignore();

   }

   cout << "Numbers in reverse: ";

   cout << numbers[num - 1]; //display last element

   for (int i = num - 2; i > -1; i--)

   {

      cout << ", ";

      cout << numbers[i];

   }

   cout << endl;

   cin.get();

   return 0;

}

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