Question

Write a working C++ program to ask the user for a set of grades which are to be stored in an array in increasing sequence. The user must first provide the number which represents the count of all grades to be provided. For example, if there will be 10 grades, the user is first prompted to provide the number 10. Subsequently, each grade is provided, one at a time. Allow for a maximum of 30 grades in defining the array. When all the grades have been sorted properly, print them all, along with the average.

Process the array using a function which is invoked from the main body of the program. The main body asks for the count of grades and then invokes the grade sequencing function.

You must write in proper C++ syntax and actually execute the program to ensure it works properly.

Answer 1

C++ CODE:

#include <iostream>

using namespace std;

//Grade sequencing function
void getGrades(int grades[], int count) {
    for(int i = 0; i < count; i++){
        cout << "Enter grade " << (i + 1) << ": ";
        cin >> grades[i];
    }
    //Sort grades in increasing sequence
    for(int i = 0; i < count - 1; i++){
        for(int j = 0; j < count - i - 1; j++){
            if(grades[j] > grades[j + 1]){
                //Swap grades
                int temp = grades[j];
                grades[j] = grades[j + 1];
                grades[j + 1] = temp;
            }
        }
    }
}

//Function to return average grade
double getAverage(int grades[], int count){
    double avg = 0.0;
    for(int i = 0; i < count; i++)
        avg += grades[i];
    avg /= count;
    return avg;
}

int main(){
    const int MAX = 30;
    int grades[MAX];
    int count;
    cout << "Enter number of grades: ";
    cin >> count;
    getGrades(grades, count);
    cout << "Sorted grades:\n";
    for(int i = 0; i < count; i++)
        cout << (i + 1) << ". " << grades[i] << endl;
    cout << "Average grade: " << getAverage(grades, count) << endl;
    return 0;
}

SAMPLE OUTPUT: