Solved Homework: Question: Construct a code in c++ with a base class called Student and a derived class called Grad Student….

Construct a code in c++ with a base class called Student and a derived class called Grad Student. Build functionality that will allow a student to enter in x number of test scores and calculate the average of the test scores. The student should also receive a letter grade based on their average. Then allow the function(s) you created in your base class to be inherited by the derived class. Be sure to not use only “public” access specifiers.

Expert Answer


The solution for the above question is given below with the screenshot of output.

I have kept the logic simple and output as per the question.

If there is anything else do let me know in comments


————————– CODE TO COPY ——————————————

#include <iostream>

using namespace std;

// base class
class Student {
    int calculateaverage() {  // calculate average
      average = sum/number;
      return average;

    int average;
    int sum;
    int number;


// derived class
class Grad_Student: public Student {
    int total;
    int num;

    void numberoftestscore() { // calculate number of test and score

      cout << "Enter number of test : ";
      cin >> number;

      num = number;

      while(num) {
        cout << "Enter test score : ";
        cin >> total;
        sum = sum + total;
        total = 0;

    char gradetest() {  // return grade score
      if((average <= 100) && (average >= 91)) {
        return 'A';
      if((average <= 90) && (average >= 81)) {
        return 'B';
      if((average <= 80) && (average >= 71)) {
        return 'C';
      if((average <= 70) && (average >= 61)) {
        return 'D';
      if((average <= 60) && (average >= 51)) {
        return 'E';

      return 'F';

int main() {
  Grad_Student gradstudent;

  int average = gradstudent.calculateaverage();
  cout << "Avgerage : " << average << endl;
  char score = gradstudent.gradetest();
  cout << "Grade Score : " << score << endl;



Enter number of test: 5 Enter test score: 86 Enter test score 90 Enter test score 70 Enter test score89 Enter test score 60 Avgerage 77 Grade Score:C

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