Demo.studentGradeParallelArrays.cpp

//**********************************************************************************
// Author: Rolando Carreon
// Date: 8 Apr 2025
// Language: C++
// Assignment: Demo
// Description: Manage grades for students and calculate an average
//**********************************************************************************
#include<iostream>
#include<iomanip>
using namespace std;

// function prototypes
double computeAverage( int[] );


// global variables
const int ARRAY_SIZE = 5;


int main()
{
    // declare local variables
    int studentGrades[ARRAY_SIZE];
    string studentNames[ARRAY_SIZE] = {"Kevin", "Fred", "Sally",
                                       "Cecilia", "Sam" };
    
    // loop through the arrays to get the students' grades
    for(int i = 0; i < ARRAY_SIZE; i++)
    {
        cout << "Enter grade for " << studentNames[i] << ": ";
        cin >> studentGrades[i];
    }
    
    // set the output to two decimal places
    cout << fixed << showpoint << setprecision(2);
    
    // get and display the average
    cout << "The average grade is "
         << computeAverage(studentGrades) << endl;
    
    return 0;
}


// function definitions

// function will accept an array of integers, it will find the sum of
// the values, calculate and return the average as a double
double compueAverage(int pArray[] )
{
    // declare the local variables
    int mySum = 0;
    double myAverage = 0.0;
    
    // iterate throught the array and the total values
    for(int i = 0; i < ARRAY_SIZE; i++)
        mySum += pArray[i];
    
    // calculate the average value
    myAverage = static_cast<double>(mySum) / ARRAY_SIZE;
    
    return myAverage;
}