1 九九乘法表
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for i in range(9):#从0循环到8 i += 1#等价于 i = i+1 for j in range(i):#从0循环到i j += 1 print(j,'*',i,'=',i*j,end = ' ',sep='') # end默认在结尾输出换行，将它改成空格 sep 默认 j,'*',i,'=',i*j 各元素输出中间会有空格 print()#这里作用是输出换行符 |
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i = 1while i <= 9: j = 1 while j <= i: print("%d*%d=%d" % (j,i,i*j),end=' ') # 格式化输出 j += 1 i += 1 print() |
2 登录程序
登录程序，有三次输入账号、密码的机会，错误三次账号锁定
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user = 'hello world'paswd = 123456username = input("请输入用户名：")password = input("请输入密码:")for i in range(3): if username == user and int(password) == paswd: #判断用户名和密码是否都匹配 print("欢迎您的到来") break elif i < 2: username = input("请输入用户名：") password = input("请输入密码") elif i == 2: print("账户已锁定") break |
3，购物车程序
功能：
1，输入余额
2，显示商品列表
3，输入要购买的东西
4，判断是否有能力购买
5，是否继续
6，输出已购买的商品和余额
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shop_car = []#用来存放购买的商品goods = { 1:['手机',2500], 2:['电脑',3500], 3:['自行车',4500], 4:['宝马',20000]}#商品列表while True: salary = input("你有多少钱：") # 输入有多少钱 if salary.isdigit(): # 判断是否为整数 salary = int(salary) # 将字符串转化为整数 print("是否要买东西：") flag1 = input("Y N:") if flag1.upper() == 'N': # 将字符串大写 exit("欢迎下次光临") # 退出程序并输出“欢迎下次光临” elif flag1.upper() == 'Y': break # 终止循环 elif flag1.upper() == 'Q': exit("欢迎下次光临") elif salary.upper() == 'Q': exit("欢迎下次光临")while True: print("淘宝".center(30,'-')) # 输出以-----淘宝------ for i in goods: # 循环输出 print(i,goods[i]) print("淘宝".center(30, '-')) choice_good = input("请输入商品编码：")#接受一个字符串 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]) # 给字典中添加元素 salary = salary - goods[choice_good][1] print("您购买的商品为：", goods[choice_good][0]) print("余额为：", salary) print("是否继续：") contin = input("Y N") if contin.upper() == 'N': break elif contin.upper() == 'Q': break else: print('余额不足') print("是否继续：") contin = input("Y N") if contin.upper() == 'N': break elif contin.upper() == 'Q': break else : print("没有这个编号") continue # 暂停本次循环 elif choice_good.upper() == "Q" : break else: print("我看不懂。。。")print("你买了：",end =' ')for i in shop_car: print(i,end=' ')print()print("余额为：",salary)print("欢迎下次光临") |
