Student Grade Calculator

Part of the Fundamentals section of Coddy's C++ journey — lesson 74 of 74.

Challenge

Easy

Create a function named calculateAverageGrade that takes an array of integers (representing student grades) and the size of the array as input and returns the average grade as a double. The function should do the following:

Calculate the sum of all grades in the array.
Calculate the average grade by dividing the sum by the number of grades.
Return the average grade

Finally the main function should print the result using the following format: Average grade: [The result].

Try it yourself

#include <iostream>



double calculateAverageGrade(int grades[], int size) {
    // Write your code here
}

int main() {
    int n;

    std::cin >> n;
    std::cin.ignore();
    int arr[n];

    for (int i = 0; i < n; i++) {
        int val;
        std::cin >> val;
        arr[i] = val;
    }


    double averageGrade = calculateAverageGrade(arr, n);
    std::cout << "Average grade: " << averageGrade << std::endl;
    return 0;
}

All lessons in Fundamentals

1Introduction

C++Hello World!Comments Basic Program Structure

4Operators Part 1

Arithmetic Operators Modulo Operator Increment/Decrement Post Increment/Decrement Arithmetic Shortcuts Comparison Operators String Comparison

7Input/Output Basics

cout Statement cin Statement String Input Recap - Till 120 Recap - True or False

10Functions

Declare a Function Parameters Return Types Function Overloading Recap - Sigma Function Recap - Validation Function Void Functions

13Final Challenges

Number Pattern Pattern FinderStudent Grade Calculator