Question

Rita is writing a C++ programe in whic, she wants to display the grades (stored in variable grade) as per the table of marks (stored in variable marks) given below: A – 90-100 B – 80-89 C – 70-79 D < 70

Answer 1

#include <iostream>
#include <vector>
using namespace std;

class Student
{
public:
Student(int mark)
{
this->mark = mark;

if (mark >= 90 && mark <= 100)
grade = 'A';
else if (mark >= 80 && mark <= 89)
grade = 'B';
else if (mark >= 70 && mark <= 79)
grade = 'C';
else if (mark < 70 && mark >= 0)
grade = 'D';
else
cout << "Invalid mark, grade not assigned";
}

int getMark()
{
return mark;
}

char getGrade()
{
return grade;
}

private:
int mark;
char grade;
};

int main()
{
vector<Student> students;
int num, mark;

cout << "Enter number of students: ";
cin >> num;

if (num <= 0)
cout << "Invalid number of students, exiting";
else
{
for (int i = 1; i <= num; i++)
{
cout << "Enter marks for student " << i << ": ";
cin >> mark;

Student s(mark);
students.push_back(s);
}
}

// do whatever you like with the vector from here onwards, such as:
/*
for (int i = 0; i < students.size(); i++)
{
cout << "Student " << i + 1 << " grade: " << students[i].getGrade() << endl;
}
*/

return 0;
}