Question

Write a c++ program to create a structure to specify data on students roll number, name, year of joining. write a function to print names of all students who joined in particular year and print data of students whose roll number is given.
Hint (Use Structure Array and search data from structure array for particular year& rollno)

Answer 1

#include<iostream>

using namespace std;

// Struct student contain roll number, name, year of joining
struct student {
    int roll_number{}, year_of_joining{};
    string name;
};

// Function to print the names of all students who joined in a given year
void print_by_year(student students[], int n, int year) {
    cout << "Student(s) joined in " << year << " year:\n";
    for (int i = 0; i < n; i++)
        if (students[i].year_of_joining == year)
            cout << students[i].roll_number << " " << students[i].name << "\n";
    cout << endl;
}

// Function to print the details of student of given roll number
void print_by_roll_number(student students[], int n, int roll) {
    cout << "Student(s) with " << roll << " roll number:\n";
    for (int i = 0; i < n; i++)
        if (students[i].roll_number == roll) {
            cout << students[i].name << " " << students[i].year_of_joining << endl;
        }
}

int main() {
    student students[5];

    students[0].name = "Jacob Williams";
    students[0].roll_number = 1;
    students[0].year_of_joining = 2018;

    students[1].name = "Michael Davis";
    students[1].roll_number = 2;
    students[1].year_of_joining = 2018;

    students[2].name = "Andrew Robinson";
    students[2].roll_number = 3;
    students[2].year_of_joining = 2019;

    students[3].name = "Emma Davis";
    students[3].roll_number = 4;
    students[3].year_of_joining = 2020;

    students[4].name = "Ethan Wright";
    students[4].roll_number = 5;
    students[4].year_of_joining = 2018;

    print_by_year(students, 5, 2018);

    print_by_roll_number(students, 5, 4);

}

Output: