C++ Final Review Function Quiz 10 questions

Summary

In this educational video, Professor Le reviews a set of key C++ programming concepts with a focus on functions. The video covers topics like the purpose of functions, how to pass values and addresses to functions, and the use of the `rand()` and `srand()` functions for random number generation. It explains the differences between value and reference passing, as well as the use of the `void` keyword for functions that don’t return a value. Aimed at helping learners master basic function-related concepts in C++, the video offers clear and concise explanations with practical examples.

Takeaways

• 😀 A block of code that performs a task is called a function.
• 😀 The expression `100 ^ 0.5` is equivalent to the square root of 100, which is 10.
• 😀 The item of information passed to a function is known as an actual argument.
• 😀 In standard C++, the built-in function for generating random numbers is `rand()`.
• 😀 To initialize the random number generator in C++, use the `srand()` function.
• 😀 A value-returning function returns a specific value to the statement that called it.
• 😀 A void function does not return any value to the statement that called it.
• 😀 The `void` keyword in C++ indicates that a function does not return a value.
• 😀 Passing a variable’s value to a function is called passing by value.
• 😀 Passing a variable’s address to a function is called passing by reference.

Q & A

What is a block of code that performs a specific task in programming?

A function.

What does the mathematical operation `100 ^ 0.5` represent in programming?

It represents the square root of 100, which is 10.

What term refers to the information passed to a function when it is called?

The term for the information passed is an 'actual argument'.

Which function is used in standard C++ to generate random numbers?

The `rand()` function is used to generate random numbers.

How do you initialize the random number generator to ensure different values are generated each time?

The random number generator is initialized using the `srand()` function, often with the current time as the seed.

What type of function returns precisely one value to the statement that called it?

A value-returning function.

What type of function does not return a value to the calling statement?

A void function.

Which keyword in C++ indicates that a function does not return a value?

The keyword `void` indicates that a function does not return a value.

What is the term for passing a function a copy of a variable's value?

This is called passing by value.

What is the term for passing a function the address of a variable, allowing it to modify the original variable?

This is called passing by reference.