C++ program to store student details using class

Introduction:

In this C++ tutorial, we will learn how to read the details of students and how to print them using a Class. We will use one class to hold the name and marks of each student and two member functions to read and print these details.

I am explaining the steps at the end of this article. You can go through the steps to learn how the program works.

C++ program to record and print student details:

The following program stores the name and marks of any number of students and prints them. It reads the values as inputs from the user.

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

// 1
class Student
{
private:
    string name;
    int marks;

public:
    void getDetails();
    void setDetails();
};

// 2
void Student::setDetails()
{
    cout << "Enter the name:" << endl;
    cin >> name;
    cout << "Enter total marks:" << endl;
    cin >> marks;
}

// 3
void Student::getDetails()
{
    cout << "Name: " << name << " ,marks: " << marks << endl;
}

int main(int argc, char const *argv[])
{
    // 4
    int count;
    cout << "Enter the total number of students: ";
    cin >> count;

    // 5
    if (count > 0)
    {
        // 6
        Student studentArray[count];
        for (int i = 0; i < count; i++)
        {
            cout << "For student " << i + 1 << ":" << endl;
            studentArray[i].setDetails();
        }

        // 7
        cout << "\nYou have entered:" << endl;
        for (int i = 0; i < count; i++)
        {
            studentArray[i].getDetails();
        }
    }
    else
    {
        cout << "Please enter a valid number." << endl;
    }
    return 0;
}

Download it on GitHub

Explanation :

The commented numbers in the above program denote the step numbers below:

1. The above example is using a class, Student, with two private variables and two public methods. The variable name and marks are used to store the name and marks of a student and the methods getDetails and setDetails are used to get the details and assign values to the private variables.

2. setDetails is a member function to assign values to the variable name and marks. If you call this function, it will ask the user to enter the name and marks. With cin, we are assigning these values to the variable name and marks.

3. getDetails member function is used to print the details. It prints the name and marks for that class object.

4. The main function is the starting point of the program. It asks the user to enter the total number of students. This value is assigned to the count variable.

5. Check if the entered value is greater than 0 or not. If not, print one message to enter a valid number.

6. If the entered value is greater than 0, create one array of Student to hold the names and marks of the students. By using one for loop, we are assigning the values to the variables of the class objects. It calls the setDetails function of a Student object to read these values.

7. It uses one more for loop to print the user-entered values. We are using the getDetails method to print the name and marks.

Sample output:

If you run the above program, it will print outputs as below:

Example 1:

Enter the count of students : 4
For student 1 :
Enter the name :
Alex
Enter total marks :
88
For student 2 :
Enter the name :
Bob
Enter total marks :
77
For student 3 :
Enter the name :
Charlie
Enter total marks :
66
For student 4 :
Enter the name :
Dan
Enter total marks :
59

You have entered :
Name : Alex ,marks : 88
Name : Bob ,marks : 77
Name : Charlie ,marks : 66
Name : Dan ,marks : 59

Example 2:

Enter the count of students : -3
Please enter a valid number.

Conclusion:

We are using the Student class to hold only the name and marks of a student. You can extend this program to hold any other information as well. Similarly, you can add more member functions to the class.

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