Question

Что напечатает программа Program first; Var X:integer; Procedure change; Var X:integer; Begin X:=1; End; Begin X:=0; Change; Write(x); End/

Answer 1

Программа напечатает: 0

Answer 2

Если в последней строке программы исправить ошибку и заменить / на точку, то программа выведет 0.
В самом деле, процедура Change присваивает переменной х значение 1, но переменной х, описанной в теле процедуры. Поэтому одноименная переменная х, описанная перед процедурой, в теле процедуры будет не видна и процедура не сможет изменить её значения. Будет выведено значение 0, которое присвоено в программе оператором Х:=0;

Answer 3

Program Explanation

The given program is written in Pascal. Let's break down the code step by step:

1. Program Declaration: - The program starts with the declaration of the program name, which is "first". - It is declared as follows: ``` Program first; ```

2. Variable Declaration: - After the program declaration, there is a variable declaration for X, which is an integer. - It is declared as follows: ``` Var X: integer; ```

3. Procedure Definition: - The program then defines a procedure named "change". - Inside the "change" procedure, there is another variable declaration for X, which is also an integer. - The procedure sets the value of the local variable X to 1. - The procedure is defined as follows: ``` Procedure change; Var X: integer; Begin X:=1; End; ```

4. Main Program Body: - After the procedure definition, the main program body begins. - It sets the value of the global variable X to 0. - Then it calls the "change" procedure. - Finally, it writes the value of X to the output. - The main program body is written as follows: ``` Begin X:=0; Change; Write(x); End; ```

Program Output

When this program is executed, it will output the value of X, which will be determined by the "change" procedure. Since the "change" procedure sets the local variable X to 1, the output of the program will be 1.

This is the detailed explanation of the given Pascal program. If you have any further questions or need additional assistance, feel free to ask!