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A reference parameter:

a. Is an alias for its corresponding argument.
b. Is declared by following the parameter's type in the function prototype by an ampersand
c. Cannot be modified
d. Both is an alias for its corresponding argument and is declared by following the parameter's type in the function prototype by an ampersand

1 Answer

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Final answer:

A reference parameter is an alias for its corresponding argument and is indicated with an ampersand (&) after the type in C++ function prototypes.

It allows the function to modify the original argument directly and can be modified unless it's declared as const.

Therefore, the correct answer is: option d). Both is an alias for its corresponding argument and is declared by following the parameter's type in the function prototype by an ampersand.

Step-by-step explanation:

A reference parameter in a function is a parameter that refers to the same memory location as its corresponding argument. This means that changes made to the reference parameter affect the original argument.

In programming languages such as C++, a reference parameter is indicated by using an ampersand (&) after the data type in the function prototype or function definition.

It is indeed an alias for its corresponding argument, allowing the function to modify the argument directly. Therefore, a reference parameter can be modified unless it is explicitly declared as const.

For example, consider the following function:

void increment(int& num)

{

num++;

}

If we call this function with a variable x as the argument, such as increment(x);, the value of x will be incremented by 1.

User Eli Sadoff
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