[python第五课]构造程序逻辑

#coding:utf-8
import random
while true:
    xuanze=int(input("请输入您想进入的题目：\n1、水仙花数\n2、百钱百鸡\n4、退出\n(请输入您的数字)"))

    if xuanze == 1:
        print("水仙花数")
        while true:
            while true:
                n=int(input("请输入一个三位数"))
                if n>100 and n<999:
                    break
                else:
                    print("您输入的数字不是三位数，请再次输入")
            print("输入成功\n下面数位分离")
            n_gewei=int(n%10)
            n_baiwei=int(n/100)
            n_shiwei=int(n_baiwei%10)
            print("百位："+str(n_baiwei)+"\n十位："+str(n_shiwei)+"\n个位："+str(n_gewei))
            jisuan=n_gewei^3+n_shiwei^3+n_baiwei^3
            if jisuan==n:
                print(str(n)+"这个数是水仙花数")
            else:
                print(str(n)+"这个数不是水仙花数")
            tuichu=int(input("请问是否想退出:\n1、退出\n2、继续\n(输入数字):"))
            if tuichu==1:
                break
            if tuichu==2:
                continue

    if xuanze == 2:
        while true:
            print("百钱百鸡\n价格：\n公鸡：5元/只\n母鸡：3元/只\n小鸡：1元/只\n用n元买")
            n_money=int(input("请输入您的零钱："))
            for i in range(int(n_money/5)):
                for j in range(int(n_money/3)):
                    for k in range(int(n_money/1)):
                        if 5*i + 3*j + 1*k ==n_money:
                            print("公鸡："+str(i)+"母鸡"+str(j)+"小鸡"+str(k))
            tuichu_1=int(input("请问是否想退出:\n1、退出\n2、继续\n(输入数字):"))
            if tuichu_1 == 1:
                break
            if tuichu_1 == 2:
                continue

    if xuanze == 4:
        break