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:
var
a, b, y: real;
begin
Write(‘Введите значение a: ‘); ReadLn(a);
Write(‘Введите значение b: ‘); ReadLn(b);
if a >= exp(1) then y := sqr(b + pi) + exp(a + 1)
else if a < 0 then y := tan(sqr(b) + pi) — ln(abs(a))
else y := sqr(a) / 3 — exp(ln(b + pi) / 3);
WriteLn(‘При a = ‘, a, ‘ y = ‘, y:0:4);
end.
Объяснение: