Exercise solution and quiz

std::abs is a standard C++ function used to compute the absolute value of a number. It’s part of the or header, depending on the type of input.

static_cast<int> is a C++ type conversion operator that explicitly converts a value to an int type at compile time.

In C++, a function declaration tells the compiler about a function's name, return type, and parameters—without specifying its actual body. It's like saying, “Hey compiler, this function exists, and here’s what it looks like,” but not yet saying what it does.

In C++, an argument refers to the actual value or variable passed to a function when it is called. It’s what you give to the function so it can do its job.

In C++, a function prototype is a declaration that tells the compiler about a function's name, return type, and parameters—before the function is actually defined. It’s like giving the compiler a heads-up: “This function exists, and here’s how it should be called.”

const my_array& a: It takes a constant reference to a my_array object

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