Write a program that lets you know if you can have a key or not, based on your role at the school.
First ask for the user’s role at the school. They can be a student, administrator, or a teacher. (And remember that capitalization is important! ‘Student’ is not the same as ‘student’.)
Example 1: Administrator or Teacher
For example, if this was the input:
Are you an administrator, teacher, or student?: teacher
This should be the output:
Administrators and teachers get keys!
Example 2: Student
And if this was the input:
Are you an administrator, teacher, or student?: student
This should be the output:
Students do not get keys!
(Note: You should also be able to handle a situation where the user enters a value other than administrator, teacher or student and tell them they must be one of the three choices!)
Example 3: Other
If they input anything else:
Are you an administrator, teacher, or student?: secretary
This should be the output:
You can only be an administrator, teacher, or student!
Ответ:
6251413
Объяснение:
Поскольку функция рекурсивно вызывает себя и при каждом вызове выводит переданное число, удобно будет записать выводимые числа в столбик, обозначая глубину стека (количество рекурсивных вызовов) и произойдет ли вызов. Очередная пара рекуррентных вызовов происходит при передаче числа больше или равного четырём.
0: F(6) -> 6 (вызов произойдёт)
1: F(2) -> 2 (вызов не произойдёт)
1: F(5) -> 5 (вызов произойдёт)
2: F(1) -> 1 (вызов произойдёт)
2: F(4) -> 4 (вызов произойдёт)
3: F(1) -> 1 (вызов не произойдёт)
3: F(3) -> 3 (вызов не произойдёт)