NP35 取号

思路：

step1：对应输入输出即可；注意条件的判断；

代码如下：

while True:
    try:
        print( "Welcome! How many people, please?\nEnter 'quit' to end the program.")
        n = input()
        if n == 'quit':
            break
        else:
            n = int(n)
            if n <= 4:
                print('Your small table is reserved!')
            elif 4 < n <= 6:
                print('Your middle table is reserved!')
            elif 6 < n <= 10:
                print('Your large table is reserved!')
            elif n > 10:
                print('Sorry, there is no free table that seats over ten persons.')
    except:
        break