Learn and Master C Programming - Let's Implement a Variadic Function in C - Technique #1

The video tutorial demonstrates how to create a variadic function in C using Visual Studio. It covers setting up a new project, implementing a sum function that accepts a variable number of arguments, and using macros like VA_LIST, VA_START, and VA_ARG to handle these arguments. The tutorial also includes testing the function with different inputs to ensure it works as expected.

What is the first step in setting up a new project in Visual Studio for implementing a variadic function?

• Open an existing project

• Choose a Python template

• Select a Java template

• Select the Visual C132 template

What is a variadic function in C?

• A function that returns multiple values

• A function that takes a fixed number of arguments

• A function that takes a variable number of arguments

• A function that does not take any arguments

Which macro is used to define a variable argument list in C?

• va_arg

• va_list

• va_start

• va_end

What is the purpose of the va_start macro?

• To initialize a variable argument list

• To read an argument from the list

• To define a variable argument list

• To end the use of a variable argument list

Which macro is used to clean up resources allocated by va_start?

• va_end

• va_cleanup

• va_list

• va_arg

What is the expected output when summing the numbers 1, 2, 3, and 4 using the implemented variadic function?

• 9

• 10

• 11

• 12

If the count is set to 2, what will the variadic function sum when given the numbers 1, 2, 3, and 4?

• 6

• 3

• 10

• 7