Question

Write a C++ program that continuously requests a donation to be entered. If the donation is less than 0 or greater than 10, your program should print an appropriate message informing the user that an invalid donation has been entered, else the donation should be added to a total. When a donation of -1 is entered, the program should exit the repetition loop and compute and display the average of the valid donations entered.

Answer 1

#include <iostream>

using namespace std;

int main(){
  
   double donation, counter = 0, total = 0, average;
  
   while(true){
       cout<<"Please enter your donation or (-1 to exit): ";
       cin>>donation;
       while((donation<0 || donation>10) && donation!=-1) {
           cout<<"Invalid donation! Please enter donation between 0 and 10."<<endl;
           cout<<"Please enter your donation or (-1 to exit): ";
           cin>>donation;  
       }
       if(donation == -1)
           break;
       total = total + donation;
       counter++;
   }
   average = (double)total/counter;
   cout<<"\nThe average of the valid donations is "<<average;
  
   return 0;
}

Screenshot of the program

Output 1:

Output 2:

NOTE: If you want to change something , please let me know through comments; I will surely revert back to you.

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