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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8
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i
=
1
while
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
=
123456
username
=
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"
)
|