🔹 Structure Examples in C++

Structures (struct) in C++ are used to group related variables of different data types together.

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1️⃣ Area of Rectangle using Structure

📌 Define a structure to calculate the area of a rectangle.

#include <iostream>
using namespace std;

struct Rectangle {
    double length;
    double width;
};

int main() {
    Rectangle rect;
    cout << "Enter length and width: ";
    cin >> rect.length >> rect.width;

    double area = rect.length * rect.width;
    cout << "Area of Rectangle: " << area;

    return 0;
}

🔹 Output

Enter length and width: 5 10
Area of Rectangle: 50

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2️⃣ Book Information using Structure

📌 Define a structure to store and display book details.

#include <iostream>
using namespace std;

struct Book {
    string title;
    string author;
    double price;
};

int main() {
    Book b;
    
    cout << "Enter Book Title: ";
    getline(cin, b.title);
    cout << "Enter Author: ";
    getline(cin, b.author);
    cout << "Enter Price: ";
    cin >> b.price;

    cout << "\nBook Details:\n";
    cout << "Title: " << b.title << "\nAuthor: " << b.author << "\nPrice: $" << b.price;

    return 0;
}

🔹 Output

Enter Book Title: The Alchemist
Enter Author: Paulo Coelho
Enter Price: 15.99

Book Details:
Title: The Alchemist
Author: Paulo Coelho
Price: $15.99

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3️⃣ Person Information using Structure

📌 Define a structure to store and display a person's information.

#include <iostream>
using namespace std;

struct Person {
    string name;
    int age;
    string city;
};

int main() {
    Person p;

    cout << "Enter Name: ";
    getline(cin, p.name);
    cout << "Enter Age: ";
    cin >> p.age;
    cin.ignore();
    cout << "Enter City: ";
    getline(cin, p.city);

    cout << "\nPerson Information:\n";
    cout << "Name: " << p.name << "\nAge: " << p.age << "\nCity: " << p.city;

    return 0;
}

🔹 Output

Enter Name: John Doe
Enter Age: 30
Enter City: New York

Person Information:
Name: John Doe
Age: 30
City: New York

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4️⃣ Student Information using Structure

📌 Define a structure to store and display student details.

#include <iostream>
using namespace std;

struct Student {
    string name;
    int rollNumber;
    double marks;
};

int main() {
    Student s;

    cout << "Enter Student Name: ";
    getline(cin, s.name);
    cout << "Enter Roll Number: ";
    cin >> s.rollNumber;
    cout << "Enter Marks: ";
    cin >> s.marks;

    cout << "\nStudent Information:\n";
    cout << "Name: " << s.name << "\nRoll Number: " << s.rollNumber << "\nMarks: " << s.marks;

    return 0;
}

🔹 Output

Enter Student Name: Alice
Enter Roll Number: 101
Enter Marks: 95.5

Student Information:
Name: Alice
Roll Number: 101
Marks: 95.5

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📌 Summary

✔ Structures help group multiple variables into a single unit.
✔ Use cin, getline(cin, variable), and cin.ignore() for user input.
✔ Nested structures can be used for complex data.

🚀 Need more examples? Let me know! 🔥