else:
raise KeyError(‘Only choose [+,_,*,/]‘)
if choose_method == "+":
print(‘%2f+%2f=%2f‘%(num1,num2,num1+num2))
elif choose_method =="-":
print(‘%2f-%2f=%2f‘%(num1,num2,num1-num2))
elif choose_method =="*":
print(‘%2f*%2f=%2f‘%(num1,num2,num1*num2))
elif choose_method =="/":
print(‘%2f/%2f=%2f‘%(num1,num2,num1/num2))
3、简单石头布游戏
a=input(‘石头,剪刀,布‘)
import numpy as np
res=np.random.choice([‘石头‘,‘剪刀‘,‘布‘])
print(res)
if a == "石头" and res == ‘布‘:
print(‘你输了‘)
elif a == "石头" and res == ‘剪刀‘:
print(‘你赢了‘)
elif a == "布" and res == ‘石头‘:
print(‘你赢了‘)
elif a == "布"and res == ‘剪刀‘:
print(‘你输了‘)
elif a == "剪刀"and res == ‘布‘:
print(‘你赢了‘)
elif a == "剪刀"and res == ‘石头‘:
print(‘你输了‘)
4、构成三角形问题
import math
a = float(input(‘a = ‘))
b = float(input(‘b = ‘))
c = float(input(‘c = ‘))
if a+b>c and a+c>b and b+c>a:
print (‘周长:%f‘%(a+b+c))
p=(a+b+c)/2
area=math.sqrt(p*(p-a)*(p-b)*(p-c))
print(‘面积:%f‘%(area))
else:
print (‘不能构成三角形‘)
5、银行卡密码
password=‘123‘
for i in range(3):
i=input(‘输入一个密码‘)
if i==password:
print (‘登录成功‘)
break
else:
print(‘密码错误‘)
