Question

Var a, b, c: integer; begin cls; write ( 'Введите первое число: ' ); readln ( a ); write ( 'Введите второе число: ' ); readln ( b ); write ( 'Введите третье число: ' ); readln ( c ); if ( a + b > 0 ) or ( b + c > 0 ) or ( a + c > 0 ) then writeln ( 'Есть положительная сумма среди введённых пользователем чисел.' ) else writeln ( 'Положительной суммы нет.' ); readln; end.​

Answer 1

Блок-схема в приложении.

Answer 2

The given code is a Pascal program that prompts the user to enter three integers (a, b, and c) and then checks if there is any positive sum among the three entered numbers. If at least one of the sums of two numbers is positive, it will output "Есть положительная сумма среди введённых пользователем чисел." (meaning "There is a positive sum among the numbers entered by the user."). Otherwise, it will output "Положительной суммы нет." (meaning "There is no positive sum.").

Here's a breakdown of the code:

1. Var a, b, c: integer; declares three integer variables a, b, and c.

2. begin marks the beginning of the main code block.

3. cls; clears the screen (this is not standard Pascal, but it might be a custom procedure to clear the console window).

4. The write statements prompt the user to enter three numbers and readln statements read the user input and assign it to variables a, b, and c.

5. The if statement checks for positive sums among the entered numbers:

   • (a + b > 0) or (b + c > 0) or (a + c > 0) checks if any of the three possible combinations of a, b, and c have positive sums.

6. If the condition inside the if statement is true, it means there is a positive sum, and it will execute the writeln statement that outputs "Есть положительная сумма среди введённых пользователем чисел."

7. If the condition is false, meaning there is no positive sum among the entered numbers, it will execute the writeln statement that outputs "Положительной суммы нет."

8. readln; is used to pause the program before it terminates, so the output can be seen by the user.

The code seems to function as expected, checking for positive sums among the three integers provided by the user.