for i in range(9):#從0循環(huán)到8
  i += 1#等價(jià)于 i = i+1
  for j in range(i):#從0循環(huán)到i
    j += 1
    print(j,'*',i,'=',i*j,end = ' ',sep='')
    # end默認(rèn)在結(jié)尾輸出換行，將它改成空格 sep 默認(rèn) j,'*',i,'=',i*j 各元素輸出中間會(huì)有空格
  print()#這里作用是輸出換行符

i = 1
while i <= 9:
  j = 1
  while j <= i:
    print("%d*%d=%d" % (j,i,i*j),end=' ') # 格式化輸出
    j += 1
  i += 1
  print()

user = 'hello world'
paswd = 123456
username = input("請(qǐng)輸入用戶(hù)名：")
password = input("請(qǐng)輸入密碼:")
for i in range(3):
  if username == user and int(password) == paswd: #判斷用戶(hù)名和密碼是否都匹配
    print("歡迎您的到來(lái)")
    break
  elif i < 2:
    username = input("請(qǐng)輸入用戶(hù)名：")
    password = input("請(qǐng)輸入密碼")
  elif i == 2:
    print("賬戶(hù)已鎖定")
    break

shop_car = []#用來(lái)存放購(gòu)買(mǎi)的商品
goods = {
  1:['手機(jī)',2500],
  2:['電腦',3500],
  3:['自行車(chē)',4500],
  4:['寶馬',20000]
}#商品列表
while True:
  salary = input("你有多少錢(qián)：") # 輸入有多少錢(qián)
  if salary.isdigit(): # 判斷是否為整數(shù)
    salary = int(salary) # 將字符串轉(zhuǎn)化為整數(shù)
    print("是否要買(mǎi)東西：")
    flag1 = input("Y   N:")
    if flag1.upper() == 'N': # 將字符串大寫(xiě)
      exit("歡迎下次光臨") # 退出程序并輸出“歡迎下次光臨”
    elif flag1.upper() == 'Y':
      break        # 終止循環(huán)
    elif flag1.upper() == 'Q':
      exit("歡迎下次光臨")
  elif salary.upper() == 'Q':
    exit("歡迎下次光臨")
while True:
    print("淘寶".center(30,'-')) # 輸出以-----淘寶------
    for i in goods: # 循環(huán)輸出
      print(i,goods[i])
    print("淘寶".center(30, '-'))
    choice_good = input("請(qǐng)輸入商品編碼：")#接受一個(gè)字符串
    if choice_good.isdigit() :
      choice_good = int(choice_good)
      if choice_good >= 1 and choice_good <= 4:
        if salary >= goods[choice_good][1]:
          shop_car.append(goods[choice_good][0]) # 給字典中添加元素
          salary = salary - goods[choice_good][1]
          print("您購(gòu)買(mǎi)的商品為：", goods[choice_good][0])
          print("余額為：", salary)
          print("是否繼續(xù)：")
          contin = input("Y  N")
          if contin.upper() == 'N':
            break
          elif contin.upper() == 'Q':
            break
        else:
          print('余額不足')
          print("是否繼續(xù)：")
          contin = input("Y  N")
          if contin.upper() == 'N':
            break
          elif contin.upper() == 'Q':
            break
      else :
        print("沒(méi)有這個(gè)編號(hào)")
        continue # 暫停本次循環(huán)
    elif choice_good.upper() == "Q" :
      break
    else:
      print("我看不懂。。。")
print("你買(mǎi)了：",end =' ')
for i in shop_car:
  print(i,end=' ')
print()
print("余額為：",salary)
print("歡迎下次光臨")