interface ILog{
    recordlog():boolean;
}

class Log4Net implements ILog{
    public recordlog():boolean{
        try{
            console.log("log4net has been recored");
            return true;
        }
        catch(e) {
            console.log(e.message);
            return false;
        }
    }
}

var log=new Log4Net();
log.recordlog();

interface IStudent{
    Name:string;
    Age:number;
}

class MiddleSchoolStudent{
    constructor(public student:IStudent){
    }
    public GetMSSInfo(){
        console.log(this.student.Name+" "+this.student.Age);
    }
}

var mss=new MiddleSchoolStudent({
    Name:"caojian",
    Age:37
});
mss.GetMSSInfo();