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!
Переведем в двоичный код значения третьего байта для ip адреса и сети:
ip: 104₁₀= 01101000₂
сеть: 64₁₀= 01000000₂
маска: x₁₀ = xxxxxxxx₂
Применим метод поразрядной конъюнкции. (с помощью логического умножения каждого бита значения маски на значения ip адреса получим значение сети). При этом в значении маски по правилам сначала должны идти единицы а затем нули.
Получим значение маски: 11000000₂ = 192₁₀
Ответ: 192