57个挑战(python+java)-lesson16

上题目：

python 代码：

from curses.ascii import isdigit
from operator import le


class Driver:
   def __init__(self):
       self.age = 0
       self.principle = {"US":16,"CH":18}
       self.country = "US"

   def get_age(this):
       age = input("What is your age?")
       while age.isdigit() == False:
             age = input("What is your age?")
       this.age = age

   def get_country(this):
       country = input("Which country are you in?")
       this.country = country

   def get_moreprincipal(this):
       countryname = input("PLease add the country name you wanna input")
       drivingage = input("Please input the age at which is leggally to drive")
       while drivingage.isdigit() == False:
             print("The age has to be a numerical number")
             drivingage = input("Please input the age at which is leggally to drive?")
       this.principle[countryname] = int(drivingage)

   def JudgeDrive(this):
       try :
         legalage = this.principle[this.country]
         if int(this.age) < legalage:
            print("You are not old enough to legally drive")
         else:
            print("You are old enough to legally drive")
       except :
            print("Sorry,we don't have the country's driving info")


lesson16 = Driver()
lesson16.get_age()
lesson16.get_country()
lesson16.get_moreprincipal()
lesson16.JudgeDrive()

效果图：

java 代码，

1. 这里把scanner 作为一个field ，最后再close.
2. 增加了一个函数GetMorePrincipal()，可以先输入国家及允许的年龄。

import java.util.HashMap;
import java.util.Scanner;

public class App {
    private int age ;
    private HashMap<String,Integer> principal = new HashMap<String,Integer>();
    private String country;
    private Scanner sc = new Scanner(System.in);


    private static boolean isNumeric(String secondstring) {
    return secondstring != null && secondstring.matches("\\d+(\\.\\d+)?");
    }

    void GetAgeCountry(){
        System.out.println("What is your age?");
        String age= this.sc.nextLine();
        while (isNumeric(age) == false)
        {
            System.out.println("What is your age?");
            age= this.sc.nextLine();
        }
        this.age = Integer.parseInt(age) ; 
        System.out.println("Which country are you in?");  
        this.country = this.sc.nextLine();  
    }

    void GetMorePrincipal(){
        System.out.println("PLease add the country name you wanna input");
        String Countryname = this.sc.nextLine();
        System.out.println("Please provide the age at which is leggaly right to drive");
        String drivingage = this.sc.nextLine();
        this.principal.put(Countryname,Integer.parseInt(drivingage));
    }

    void JudgeDrive(){
        this.principal.put("US",16);
        this.principal.put("CN",20);
        int legalage = this.principal.get(this.country);
        if (this.age > legalage)
        {
            System.out.println("You are old enough to legally drive at "+ this.age + " in " + this.country);
        }
        else{
            System.out.println("You are not old enough to legally drive at "+ this.age + " in " + this.country);
        }
    }




    public static void main(String[] args) throws Exception {
        App lesson16 = new App();
        lesson16.GetAgeCountry();
        lesson16.GetMorePrincipal();
        lesson16.JudgeDrive();
        lesson16.sc.close();
    }
}

效果图：