The C-style array passing challenge The designers of the C language had a problem. Consider the following simple program: #include <iostream> void print(int val) { std::cout << val; } int main() { int x { 5 }; print(x); return 0; } When print(x) is called, the value of argument x …
Pointers are one of C++’s historical boogeymen, and a place where many aspiring C++ learners have gotten stuck. However, as you’ll see shortly, pointers are nothing to be scared of. In fact, pointers behave a lot like lvalue references. But before we explain that further, let’s do some setup. Related …
In lesson , we introduced C-style arrays, which allow us to define a sequential collection of elements: int testScore[30] {}; // an array of 30 ints, indices 0 through 29 In lesson , we defined a string as a collection of sequential characters (such as “Hello, world!”), and introduced C-style …
Consider a game like Tic-tac-toe. The standard board for this game is a 3×3 grid, with players taking turns placing ‘X’ and ‘O’ symbols. The first to get three symbols in a row wins. While you could store the board data as 9 individual variables, we know that when you …
To recap the process needed to use a library: Once per library: Acquire the library. Download it from the website or via a package manager. Install the library. Unzip it to a directory or install it via a package manager. Tell the compiler where to look for the header file(s) …
Sorting an array is the process of arranging all of the elements in the array in a particular order. There are many different cases in which sorting an array can be useful. For example, your email program generally displays emails in order of time received, because more recent emails are …
In the introductory lesson for this chapter (), we introduced the scalability challenges that occur when we have many related individual variables. In this lesson, we’ll reintroduce the problem, and then discuss how arrays can help us elegantly solve problems such as these. The variable scalability challenge, revisited Consider the …
To recap the process needed to use a library: Once per library: Acquire the library. Download it from the website or via a package manager. Install the library. Unzip it to a directory or install it via a package manager. Once per project: Tell the compiler where to look for …
A library is a package of code that is meant to be reused by many programs. Typically, a C++ library comes in two pieces: A header file that defines the functionality the library is exposing (offering) to the programs using it. A precompiled binary that contains the implementation of that …
Warning This lesson has been deprecated and replaced with the updated lessons in the latter half of chapter 17 (starting with lesson ). This lesson continues the discussion of arrays that began in lesson . Initializing fixed arrays Array elements are treated just like normal variables, and as such, they …
