Appliquer la notion

Sur repl.it, exécuter le code TypeScript suivant :

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class User {
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  private name: string;
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  private age: number;
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  public constructor(name: string, age: number) {
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    this.name = name;
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    this.age = age;
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  }
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  public getName() {
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    return this.name;
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  }
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  public getAge() {
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    return this.age;
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  }
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}
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let alice = new User('Alice', 25);
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console.log(`${alice.getName()} a ${alice.getAge()} ans`);
Question
Faire une méthode birthday qui affiche « Joyeux anniversaire [name] ! ».
Solution
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class User {
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  private name: string;
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  private age: number;
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  public constructor(name: string, age: number) {
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    this.name = name;
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    this.age = age;
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  }
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  public getName() {
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    return this.name;
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  }
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  public getAge() {
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    return this.age;
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  }
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  public birthday() {
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    console.log(`Joyeux anniversaire ${this.name} !`);
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  }
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}
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let alice = new User("Alice", 25);
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console.log(`${alice.getName()} a ${alice.getAge()} ans`);
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alice.birthday();