Basic Pseudocode Questions (3) | 现代数学启蒙

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Q51: How do you define a class in pseudocode?

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Q51: How do you define a class in pseudocode?

A51:

Q52:Write a simple class definition for a `Dog` with a property `Name` and a procedure `Bark`.

Answers:

Q52: Write a simple class definition for a Dog with a property Name and a procedure Bark.

A52:

Q53:How do you create an object of a class `Car`?

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Q53: How do you create an object of a class Car?

A53: MyCar ← NEW Car()

Q54:How is inheritance denoted in pseudocode?

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Q54: How is inheritance denoted in pseudocode?

A54: Using the INHERITS keyword, e.g., CLASS Cat INHERITS Animal.

Q55:Write a constructor for a class `Person` that initializes a `Name` property.

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Q55: Write a constructor for a class Person that initializes a Name property.

A55:

Q56:What are the rules for naming identifiers in pseudocode?

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Q56: What are the rules for naming identifiers in pseudocode?

A56: Identifiers must:

Start with a letter.

Contain only letters, digits, and underscores.

Be case-insensitive.

Q57:Write an example of declaring a variable with a meaningful name.

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Q57: Write an example of declaring a variable with a meaningful name.

A57: DECLARE PlayerScore : INTEGER

Q58:What is the purpose of using meaningful identifier names?

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Q58: What is the purpose of using meaningful identifier names?

A58: To make the pseudocode easier to understand and maintain.

Q59:Can keywords like `IF` or `WHILE` be used as identifiers?

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Q59: Can keywords like IF or WHILE be used as identifiers?

A59: No, keywords cannot be used as identifiers.

Q60:How do you declare multiple variables of the same data type in one line?

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Q60: How do you declare multiple variables of the same data type in one line?

A60: DECLARE X, Y, Z : INTEGER

Q61:What does the assignment `X ← X + 1` do?

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Q61: What does the assignment X ← X + 1 do?

A61: It increments the value of X by 1.

Q62: Write an example of a compound assignment using arithmetic operations.

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Q62: Write an example of a compound assignment using arithmetic operations.

A62: Total ← Total + Price

Q63: Which operator is used for integer division?

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Q63: Which operator is used for integer division?

A63: DIV

Q64:Write a pseudocode statement to calculate the remainder of `A` divided by `B`.

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Q64: Write a pseudocode statement to calculate the remainder of A divided by B.

A64: Remainder ← A MOD B

Q65:How do you ensure clarity in complex arithmetic expressions?

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Q65: How do you ensure clarity in complex arithmetic expressions?

A65: Use parentheses to explicitly define the order of operations, e.g., (A + B) * C.

Q66:How do you declare a two-dimensional array of size 3x3 to store characters?

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Q66: How do you declare a two-dimensional array of size 3x3 to store characters?

A66: DECLARE Grid : ARRAY[1:3, 1:3] OF CHAR

Q67:Write a statement to assign the value `'X'` to the middle cell of a 3x3 array `Board`.

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Q67: Write a statement to assign the value 'X' to the middle cell of a 3x3 array Board.

A67: Board[2, 2] ← 'X'

Q68:How would you iterate over all elements in a two-dimensional array `Matrix`?

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Q68: How would you iterate over all elements in a two-dimensional array Matrix?

A68:

Q69:Can you assign one array to another directly?

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Q69: Can you assign one array to another directly?

A69: Yes, provided they have the same size and data type. Example: Array2 ← Array1

Q70:How do you initialize all elements of a one-dimensional array to a default value?

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Q70: How do you initialize all elements of a one-dimensional array to a default value?

A70:

Q71:What is the purpose of an `ELSE` clause in an `IF` statement?

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Q71: What is the purpose of an ELSE clause in an IF statement?

A71: To specify actions when the condition evaluates to FALSE.

Q72:Write an `IF` statement to check if a variable `Age` is greater than or equal to 18.

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Q72: Write an IF statement to check if a variable Age is greater than or equal to 18.

A72:

Q73: How do you handle multiple conditions using nested `IF` statements?

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Q73: How do you handle multiple conditions using nested IF statements?

A73:

Q74:When should you use a `CASE` statement instead of an `IF` statement?

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Q74: When should you use a CASE statement instead of an IF statement?

A74: When multiple specific values of a variable need to be tested.

Q75:Write a `CASE` statement for a variable `Day` to output the name of the day for `1` (Monday) to `7` (Sunday).

Answers:

Q75: Write a CASE statement for a variable Day to output the name of the day for 1 (Monday) to 7 (Sunday).

A75:

Q51: How do you define a class in pseudocode?

Q52:Write a simple class definition for a Dog with a property Name and a procedure Bark.

Q53:How do you create an object of a class Car?

Q54:How is inheritance denoted in pseudocode?

Q55:Write a constructor for a class Person that initializes a Name property.

Q56:What are the rules for naming identifiers in pseudocode?

Q57:Write an example of declaring a variable with a meaningful name.

Q58:What is the purpose of using meaningful identifier names?

Q59:Can keywords like IF or WHILE be used as identifiers?

Q60:How do you declare multiple variables of the same data type in one line?

Q61:What does the assignment X ← X + 1 do?

Q62: Write an example of a compound assignment using arithmetic operations.

Q63: Which operator is used for integer division?

Q64:Write a pseudocode statement to calculate the remainder of A divided by B.

Q65:How do you ensure clarity in complex arithmetic expressions?

Q66:How do you declare a two-dimensional array of size 3x3 to store characters?

Q67:Write a statement to assign the value 'X' to the middle cell of a 3x3 array Board.

Q68:How would you iterate over all elements in a two-dimensional array Matrix?

Q69:Can you assign one array to another directly?

Q70:How do you initialize all elements of a one-dimensional array to a default value?

Q71:What is the purpose of an ELSE clause in an IF statement?

Q72:Write an IF statement to check if a variable Age is greater than or equal to 18.

Q73: How do you handle multiple conditions using nested IF statements?

Q74:When should you use a CASE statement instead of an IF statement?

Q75:Write a CASE statement for a variable Day to output the name of the day for 1 (Monday) to 7 (Sunday).

Q52:Write a simple class definition for a `Dog` with a property `Name` and a procedure `Bark`.

Q53:How do you create an object of a class `Car`?

Q55:Write a constructor for a class `Person` that initializes a `Name` property.

Q59:Can keywords like `IF` or `WHILE` be used as identifiers?

Q61:What does the assignment `X ← X + 1` do?

Q64:Write a pseudocode statement to calculate the remainder of `A` divided by `B`.

Q67:Write a statement to assign the value `'X'` to the middle cell of a 3x3 array `Board`.

Q68:How would you iterate over all elements in a two-dimensional array `Matrix`?

Q71:What is the purpose of an `ELSE` clause in an `IF` statement?

Q72:Write an `IF` statement to check if a variable `Age` is greater than or equal to 18.

Q73: How do you handle multiple conditions using nested `IF` statements?

Q74:When should you use a `CASE` statement instead of an `IF` statement?

Q75:Write a `CASE` statement for a variable `Day` to output the name of the day for `1` (Monday) to `7` (Sunday).