Answer to Question #323482 in C++ for Dinesh

Question

There are 15 students in the class. Students had their mid term result

in INT105 and teacher from CSE domain wants to find the average

marks of the class for course code INT105 and display it. Write a

program using C++ programming language that consists of an class

having name Student containing one integer array data member which

stores the total marks of 15 students and float data member that

calculate the stores average marks to 10 students. Use constructor to

initialize data members and member functions to calculate and display

average marks.

Answer 1

#include <iostream>
using namespace std;


class Student {
    int marks[15];


public:
    Student(int arr[], int n);
    double getAverageMarks(int n);
    void displayAverageMarks(int n);
};


Student::Student(int arr[], int n) {
    for (int i=0; i<15; i++) {
        if (i<n) {
            marks[i] = arr[i];
        }
        else {
            marks[i] = 0;
        }
    }
}


double Student::getAverageMarks(int n) {
    int sum = 0;


    for (int i=0; i<n; i++) {
        sum += marks[i];
    }
    return static_cast<double>(sum) / n;
}


void Student::displayAverageMarks(int n) {
    cout << "Average marks of " << n << " students is "
         << getAverageMarks(n);
}


int main() {
    int marks[] = {98, 89, 67, 99, 100, 84, 78, 92, 94, 95};
    Student student(marks, 10);
    student.displayAverageMarks(10);


    return 0;
}