(function () {
    // 类型定义数据
    let obj = {
        name: 'John Doe',
        age: 30,
        a: 12
    };
    // 使用接口
    class Person {
        constructor(color, types) {
            this.color = color;
            this.types = types;
            // this.price = price;
        }
        say() {
            console.log('走进来');
        }
    }
    let p = new Person('红色', '牡丹');
    console.log(p);
})();