Question

Write a new program named Bar that prompts the user to enter a positive integer. The program should then display a line consisting of the entered number of asterisks using a while loop. If the user enters a number that is not positive, the program should display an error message (see example below).

Example 1: Enter a positive number: 6 ******

Example 2: Enter a positive number: 11 ***********

Example 3: Enter a positive number: -4 -4 is not a positive number

Answer 1

Answer:

Program:

#include<iostream>
using namespace std;
int main() /* main() function starts here */
{
   int n,i; /* variable declaration */
   cout<<"Enter a positive number:"; /* displays a message */
   cin>>n; /* reads an integer from the keyboard and stores in 'n' */
   if(n>=0) /* if n is greater than or equal to 0 */
   {
       i=1; /* the counter variable 'i' starts at 1 */
       while(i<=n) /* until 'i' is less than or equal to 'n', the loop repeats */
       {
           cout<<"*"; /* prints '*' symbol once */
           i++; /* increments 'i' by 1 */
       }
   }
   else /* if n is less than 0 */
   {
       cout<<n<<" is not a positive number"; /* displays a message that 'n' is not a positive number */
   }
   return 0;
} /* end of main() */

Program Screenshot:

Output: