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:
A) A[1] = 2 A[2] = 3 A[3] = 4 A[4] = 5 A[5] = 5
Б) A[1] = 1 A[2] = 1 A[3] = 2 A[4] = 3 A[5] = 4
В) A[1] = 1 A[2] = 2 A[3] = 4 A[4] = 8 A[5] = 16
Объяснение:
Массив: A[1] = 1 A[2] = 2 A[3] = 3 A[4] = 4 A[5] = 5
N = 5 (количество элементов массива)
В цикле Для шаг равен 1:
если to, то шаг равен плюс 1
если downto, то шаг равен минус 1
A) для i от 1 до 4 (5 — 1 = 4) выполнить A[i] = A[i+1]
A[1] = A[1 + 1] = A[2] = 2
A[2] = A[2 + 1] = A[3] = 3
A[3] = A[3 + 1] = A[4] = 4
A[4] = A[4 + 1] = A[5] = 5
последний элемент остаётся без изменений
Б) для i от 5 до 2 выполнить A[i] = A[i-1]
A[5] = A[5 — 1] = A[4] = 4
A[4] = A[4 — 1] = A[3] = 3
A[3] = A[3 — 1] = A[2] = 2
A[2] = A[2 — 1] = A[1] = 1
первый элемент остаётся без изменений
В) для i от 2 до 5 выполнить A[i] = A[i-1]*2
A[2] = A[2 — 1] * 2 = A[1] * 2 = 1 * 2 = 2
A[3] = A[3 — 1] * 2 = A[2] * 2 = 2 * 2 = 4
A[4] = A[4 — 1] * 2 = A[3] * 2 = 4 * 2 = 8
A[5] = A[5 — 1] * 2 = A[4] * 2 = 8 * 2 = 16
первый элемент остаётся без изменений