1 九九乘法表
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for
i
in
range
(
9
):
#從0循環到8
i
+
=
1
#等價於 i = i+1
for
j
in
range
(i):
#從0循環到i
j
+
=
1
print
(j,
'*'
,i,
'='
,i
*
j,end
=
' '
,sep
=
'')
# end默認在結尾輸出換行，將它改成空格 sep 默認 j,'*',i,'=',i*j 各元素輸出中間會有空格
print
()
#這里作用是輸出換行符
|
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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
=
' '
)
# 格式化輸出
j
+
=
1
i
+
=
1
print
()
|
2 登錄程序
登錄程序，有三次輸入賬號、密碼的機會，錯誤三次賬號鎖定
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user
=
'hello world'
paswd
=
123456
username
=
input
(
"請輸入用戶名："
)
password
=
input
(
"請輸入密碼:"
)
for
i
in
range
(
3
):
if
username
=
=
user
and
int
(password)
=
=
paswd:
#判斷用戶名和密碼是否都匹配
print
(
"歡迎您的到來"
)
break
elif
i <
2
:
username
=
input
(
"請輸入用戶名："
)
password
=
input
(
"請輸入密碼"
)
elif
i
=
=
2
:
print
(
"賬戶已鎖定"
)
break
|
3，購物車程序
功能：
1，輸入余額
2，顯示商品列表
3，輸入要購買的東西
4，判斷是否有能力購買
5，是否繼續
6，輸出已購買的商品和余額
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shop_car
=
[]
#用來存放購買的商品
goods
=
{
1
:[
'手機'
,
2500
],
2
:[
'電腦'
,
3500
],
3
:[
'自行車'
,
4500
],
4
:[
'寶馬'
,
20000
]
}
#商品列表
while
True
:
salary
=
input
(
"你有多少錢："
)
# 輸入有多少錢
if
salary.isdigit():
# 判斷是否為整數
salary
=
int
(salary)
# 將字符串轉化為整數
print
(
"是否要買東西："
)
flag1
=
input
(
"Y N:"
)
if
flag1.upper()
=
=
'N'
:
# 將字符串大寫
exit(
"歡迎下次光臨"
)
# 退出程序並輸出“歡迎下次光臨”
elif
flag1.upper()
=
=
'Y'
:
break
# 終止循環
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:
# 循環輸出
print
(i,goods[i])
print
(
"淘寶"
.center(
30
,
'-'
))
choice_good
=
input
(
"請輸入商品編碼："
)
#接受一個字符串
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
(
"您購買的商品為："
, goods[choice_good][
0
])
print
(
"余額為："
, salary)
print
(
"是否繼續："
)
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："
)
contin
=
input
(
"Y N"
)
if
contin.upper()
=
=
'N'
:
break
elif
contin.upper()
=
=
'Q'
:
break
else
:
print
(
"沒有這個編號"
)
continue
# 暫停本次循環
elif
choice_good.upper()
=
=
"Q"
:
break
else
:
print
(
"我看不懂。。。"
)
print
(
"你買了："
,end
=
' '
)
for
i
in
shop_car:
print
(i,end
=
' '
)
print
()
print
(
"余額為："
,salary)
print
(
"歡迎下次光臨"
)
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