Question

In C++ Programming, Try using loops only.

This lab demonstrates the use of the While Loop and the Do While Loop as error checking mechanisms. You will be using each of these loops to solve the same problem. Please put them both in the same program. When you test the code, you will not see a difference in the way they execute - but there will be a difference in the logic when writing the code. You will want to write a refined algorithm for both to see the logic differences.

Lab 7 Part a: Using a While Loop, write the code that does the following: Prompts the User for a score between 0 and 100 (inclusive). Repeats the prompt until the User enters a valid number within the specified range. When the user enters a number within the valid range, let them know with an output statement.

Lab 7 Part b: Using a Do While Loop, write the code that does the following: Prompts the User for a score between 0 and 100 (inclusive). Continues to prompt for scores until the User enters a valid number within the specified range. When the user enters a number within the valid range, let them know with an output statement.

Include the following in your programs: 1. A refined algorithm for each looping structure.

2. The code to pause the screen when displaying output: system ("pause");

Answer 1

#include<iostream>

using namespace std;

int main()
{
   int num=-1;//initialized to run while loop the first time
   while (num<0 || num >100)
   {
       cout<<"Enter a score between 0 and 100 (inclusive): ";
       cin>>num;
   }
   cout<<"You entered: "<<num<<endl;
  
   do
   {
       cout<<"Enter a score between 0 and 100 (inclusive): ";
       cin>>num;
   }while(num<0 || num >100);
   cout<<"You entered: "<<num<<endl;
   system("pause");
   return 0;
}