Classes आणि OOP

class BankAccount {
  public owner: string;      // सगळीकडून access
  private balance: number;   // फक्त class च्या आत
  protected accountNo: string; // subclass मधूनही access

  constructor(owner: string, initialBalance: number) {
    this.owner = owner;
    this.balance = initialBalance;
    this.accountNo = "ACC" + Math.random().toString().slice(2, 8);
  }

  public deposit(amount: number): void {
    this.balance += amount;
  }

  public getBalance(): number {
    return this.balance;
  }
}

const acc = new BankAccount("Avadhoot", 5000);
acc.deposit(1000);
console.log(acc.getBalance()); // 6000
console.log(acc.balance);      // ❌ ERROR: private

interface Shape {
  area(): number;
  perimeter(): number;
}

class Rectangle implements Shape {
  constructor(private width: number, private height: number) {}

  area(): number {
    return this.width * this.height;
  }

  perimeter(): number {
    return 2 * (this.width + this.height);
  }
}

const rect = new Rectangle(5, 3);
console.log(rect.area());      // 15
console.log(rect.perimeter()); // 16