Question

A)Write a C++ program using a while loop for Programming Exercise 5.1 on p. 193.

Turn in a printout of the program and a printout of the results.

Test the program for the two test cases in the book along with a third test case that includes 10 valid numbers (including some negative and some positive).

Answer 1

You have not shown the exact question of Ex5.1 I am still showing how to use while loop -

Consider we have array of 10 elements and we are using while loop to iterate the array and print all the positive elements present in the array

Below is the C++ code I hope that i have provided sufficient comments for your better understanding Note that I have done proper indentation but this code is automatically left alligned on this interface

#include<bits/stdc++.h>
using namespace std;

int main()
{
    int arr[] = {10, -23, 50, 12, 54, -45, -54, 28, 26, -6};
    int n = 10; //denotes number of elements
    int i = 0; //denotes index number

    cout<<"Positive elements present in array are: ";
    while(i<n) //Traverse all elements
    {
        if(arr[i]>0)
            cout<<arr[i]<<" ";
        i++;    //increment index by 1
    }
}

Below is the screenshot of output

I have tried to explain it in very simple language and I hope that i have answered your question satisfactorily.Leave doubts in comment section if any