C++

Hello World & Basic Class Example

// Hello World
#include <iostream>
using namespace std;

int main() {
    cout << "Hello, World!" << endl;
    return 0;
}

// Basic Class Example
#include <iostream>
#include <string>
using namespace std;

class Person {
private:
    string name;
    int age;

public:
    // Constructor
    Person(string n, int a) : name(n), age(a) {}
    
    // Getter methods
    string getName() const { return name; }
    int getAge() const { return age; }
    
    // Method
    void introduce() const {
        cout << "Hi, I'm " << name << " and I'm " << age << " years old." << endl;
    }
};

int main() {
    Person person("Alice", 25);
    person.introduce();
    return 0;
}

// Modern C++ with STL
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main() {
    vector<int> numbers = {5, 2, 8, 1, 9};
    
    // Sort using STL algorithm
    sort(numbers.begin(), numbers.end());
    
    // Print using range-based for loop (C++11)
    for (const auto& num : numbers) {
        cout << num << " ";
    }
    cout << endl;
    
    return 0;
}