Question

Write C++ program to create a student record include a student ID, first name, nickname, course, subject, and subject marks.

Task:

Create a function to insert a number of students in the record.

Create a function to print all student information by a table.

Create a function to print all student information that they're in a specific course chosen by user input.

Create a function to search for a student by student ID and print student information.

Create a function to search for a student by student ID and edit student marks bu user input.

Create a function to find the Average marks in the specific course chosen by user input.

Create a function to increase student marks 10% for students whose marks is less than marks chosen by user input.

Answer 1

CODE:

OUTPUT:

RAW CODE:

#include<iostream>
using namespace std;
struct student{
        string ID;
        string first_name;
        string nick_name;
        string course;
        float marks;
        student *next;
}*head = NULL;
void insert(string id,string f_name,string n_name,string course,float marks){
        struct student *temp = new(struct student);
        temp->ID = id;
        temp->first_name = f_name;
        temp->nick_name = n_name;
        temp->course = course;
        temp->marks = marks;
        temp->next = NULL;
        if(head==NULL){
                temp->next = head;
                head = temp;
        }
        else{
                struct student *trav = head;
                while(trav->next!=NULL){
                        trav = trav->next;
                }
                trav->next = temp;
        }
}
void print_students(){
        cout << endl;
        struct student *trav = head;
        cout << "Students in the Recordes:\n";
        if(head==NULL){
                cout << "There is no student in the record\n";    
        }
        else{
                struct student *trav = head;
                cout << "ID\tFirst Name\tNick Name\tcourse\tmarks\n";
                while(trav!=NULL){
                        cout << trav->ID << "\t" << trav->first_name << "\t\t" << trav->nick_name << "\t\t" << trav->course << "\t" << trav->marks << endl;
                        trav = trav->next;
                }
        }
}
void course_chosen(string course){
        cout << endl;
        struct student *trav = head;
        cout << "Student information that they're in a specific course:\n";
        cout << "ID\tFirst Name\tNick Name\tcourse\tmarks\n";
        while(trav!=NULL){
                if (trav->course == course){
                        cout << trav->ID << "\t" << trav->first_name << "\t\t" << trav->nick_name << "\t\t" << trav->course << "\t" << trav->marks << endl;
                }
                trav = trav->next;
        }
}
void search(string id){
        cout << endl;
        struct student *trav = head;
        cout << "Student information with given student id:\n";
        cout << "ID\tFirst Name\tNick Name\tcourse\tmarks\n";
        while(trav!=NULL){
                if (trav->ID == id){
                        cout << trav->ID << "\t" << trav->first_name << "\t\t" << trav->nick_name << "\t\t" << trav->course << "\t" << trav->marks << endl;
                        break;
                }
                trav = trav->next;
        }
}
void edit_marks(string id,float marks){
        cout << endl;
        struct student *trav = head;
        while(trav!=NULL){
                if (trav->ID == id){
                        trav->marks = marks;
                        break;
                }
                trav = trav->next;
        }
}
void average_course(string course){
        cout << endl;
        struct student *trav = head;
        float sum = 0;
        int count = 0;
        while(trav!=NULL){
                if (trav->course == course){
                        sum += trav->marks;
                        count += 1;
                }
                trav = trav->next;
        }
        float average= sum/count;
        cout << "Average of " << course << " course is " << average << "\n";
}
void increase_marks(float marks){
        struct student *trav = head;
        while(trav!=NULL){
                if (trav->marks < marks){
                        trav->marks += trav->marks * ((float)10/100);
                }
                trav = trav->next;
        }
}
int main()
{
        int n;
        string id,f_name,n_name,course;
        float marks;
        cout << "Enter number of students: ";
        cin >> n;
        cout << "\n";
        for (int i = 0; i < n; ++i)
        {
                cout << "Enter ID:";cin >> id;
                cout << "Enter First name: ";cin >> f_name;
                cout << "Enter nick name: ";cin >> n_name;
                cout << "course: ";cin >> course;
                cout << "marks: ";cin >> marks;
                cout << "\n";
                insert(id,f_name,n_name,course,marks);
        }


        print_students();
        cout << "\n";

        cout << "Chose course to print all students: " ;
        cin >> course;
        course_chosen(course);
        cout << "\n";

        cout << "Chose ID to print student information: " ;
        cin >> id;
        search(id);
        cout << "\n";

        cout << "Chose ID to change marks: " ;
        cin >> id;
        cout << "Enter marks: ";
        cin >> marks;
        edit_marks(id,marks);
        cout << "\n";

        cout << "Chose course to average marks: " ;
        cin >> course;
        average_course(course);
        cout << "\n";

        cout << "Chose marks to increase 10% : " ;
        cin >> marks;
        increase_marks(marks);
        cout << "\n";

        print_students();
        return 0;
}

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