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ts重点学习67-类中的修饰符笔记

夜空一星 2022-10-02 阅读 116

export default {}

class Person {
public name: string;
protected age: number;
private sex: string;

constructor(name: string, age: number, sex: string){
this.name = name;
this.age = age;
this.sex = sex;
}

say():void {
console.log(`我的名字是${this.name}, 性别为${this.sex}, 今年${this.age}岁了`);

}
}

let p = new Person("邱淑贞", 18, "女");
p.say();

class Student extends Person {
score: string
constructor(name: string, age: number, sex: string, score: string){
super(name, age, sex);
this.score = score;
}
show(): void {
console.log(this.name);
console.log(this.age);
console.log(this.score);
// console.log(this.sex);

}
}

// 思考题: 如果我们给 constructor 加上 protected 会出现什么情况?


// readonly
class PrintConsole {
readonly str1: string = "HTML, CSS, JS, VUE, REACT, NODE";
readonly str2: string;
readonly str3: string;
readonly str4: string;

constructor(str2: string, str3: string, str4: string){
this.str2 = str2;
this.str3 = str3;
this.str4 = str4;
}
}

let pc = new PrintConsole("我的头发去哪了,颈椎康复指南",
"35岁失业了该怎么办, 外卖月入一万也挺好",
"活着")



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