switch语句类型
'''
switch(n)
{
case 1:
执行代码块 1
break;
case 2:
执行代码块 2
break;
default:
n 与 case 1 和 case 2 不同时执行的代码
}
'''
例如：
'''
switch (day)
{
case 0:
x="Today it's Sunday";
break;
case 1:
x="Today it's Monday";
break;
case 2:
x="Today it's Tuesday";
break;
case 3:
x="unknown"
}
'''
python中字典方式
day = 3
switcher = {
0:'Today it\'s Sunday',
1:'Today it\'s Monday',
2:'Today it\'s Tuesday'
}
#day_name =switcher[day] #并不能显示default
day_name = switcher.get(day,'Unknown')
print(day_name)
函数
day = 3
def get_monday():
return 'Monday'
def get_sunday():
return 'Sunday'
def get_tuesday():
return 'Tuesday'
def get_default():
return 'Unknown'
switcher1 = {
0:get_sunday,
1:get_monday,
2:get_tuesday
}
day_name = switcher1.get(day,get_default)()
print(day_name)
