Question

(C++ ) Create a program that contains 4 methods / functions... main(), getTestScores(), calcAverage(), and displayAverage(). The main() method should call the getTestScores() method to get and return each of 3 test scores. The main function should then call the calcAverage() method and send the three scores down to calculate and return the average of the three test scores. The main() method should then call the displayAverage() method to display the average of test scores.

Answer 1

#include <iostream>

using namespace std;

double inputScore();
void getTestScores(double &, double &, double &);
double calcAverage(double, double, double);
void displayAverage(double);

int main() {
    double score1, score2, score3;
    getTestScores(score1, score2, score3);
    double avg = calcAverage(score1, score2, score3);
    displayAverage(avg);
    return 0;
}

void getTestScores(double &n1, double &n2, double &n3) {
    n1 = inputScore();
    n2 = inputScore();
    n3 = inputScore();
}

double inputScore() {
    double score;
    cout << "Enter a test score: ";
    cin >> score;
    while (score < 0 || score > 100) {
        cout << "Invalid score. Enter a test score: ";
        cin >> score;
    }
    return score;
}

double calcAverage(double n1, double n2, double n3) {
    return (n1 + n2 + n3) / 3;
}

void displayAverage(double avg) {
    cout << "Average of the test scores is " << avg << endl;
}