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Questions and Answers
When passing arguments to a function by value in C++, what happens?
What is the purpose of the max function mentioned in the text?
What is meant by 'parameter order association' in the context of function calls?
What does the function described in the text do?
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What is the advantage of using functions in C++?
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What is the output of the following C++ code?
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Which of the following is a valid way to define a function in C++ that takes two integer parameters and returns their sum?
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What is the purpose of the void keyword when used as a return type in a C++ function definition?
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What is the output of the following C++ code?
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Which of the following statements about function overloading in C++ is correct?
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What is the output of the following C++ code?
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Study Notes
Functions in C++
- Functions are similar to procedures and methods used in other programming languages, used to perform specific tasks and encapsulate code for easier organization and reusability.
- Functions can take parameters and return values.
Defining Functions
- A function is defined using the syntax
return type functionName(parameters) {}. - The
return typespecifies the type of value the function will return. - If the function does not return anything,
voidis specified as the return type.
Passing Arguments to a Function
- By default, arguments are passed by value to parameters when invoking a function.
- When calling a function, arguments must be provided in the same order as their respective parameters in the function signature.
- This is known as parameter order association.
Calling Functions
- A function is called by invoking the function and passing the necessary arguments.
- When a function is called, the code inside the function body gets executed.
- The function can return a value, which can be assigned to a variable.
Example: Square Function
- The
squarefunction takes an integer parameternumand calculates and returns the square ofnum. - The function is called with an argument, such as
square(5), and the code inside the function is executed, returning the calculated value. - The returned value can be assigned to a variable, such as
int area = square(5).
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Description
Learn about passing arguments by value in C++ functions and how the parameters and arguments are associated. Understand how to work with parameters and call functions with the correct order of arguments.
