Question

How to write a C++ program that allows a user to enter their rating of the three movies in the Dark Knight Trilogy and then display each rating entered, the highest rating, the lowest rating, and the average of the ratings??

Answer 1

The program is an illustration of arrays.

Arrays are used to hold multiple values in one variable.

The program in C++ where comments are used to explain each line is as follows:

#include <iostream>

using namespace std;

int main(){

   //This declares an array of three elements for the three ratings

   int ratings[3];

   //This initializes the sum of the ratings to 0

   int total = 0;

   //The following iteration gets input for the three ratings

   for(int i = 0; i<3;i++){

       cin>>ratings[i];

       //This calculates the sum of all inputs

       total+=ratings[i];

   }

   //This declares and initializes the lowest and the highest ratings

   int lowest = ratings[0], highest = ratings[0];

   //This iterates through the array

   for(int i = 1; i<3;i++){

       //The following if condition determines the lowest rating

       if (lowest > ratings[i]){    lowest = ratings[i];        }

       //The following if condition determines the highest rating

       if (highest < ratings[i]){            highest = ratings[i];        }

   }

   //This prints the output header

   cout<<"The ratings are: ";

   //The following iteration prints the three ratings

   for(int i = 0; i<3;i++){

       cout<<ratings[i]<<" ";   }

   //The prints the highest ratings

cout<<endl<<"Highest: "<<highest<<endl;

   //The prints the lowest rating

   cout<<"Lowest: "<<lowest<<endl;

   //The prints the average rating

cout<<"Average: "<<total/3<<endl;

   return 0;

}

At the end of the program, the ratings entered, the highest rating, the lowest rating, and the average of the ratings are printed.

See attachment for sample run

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