In the last chapter, we defined a function as a collection of statements that execute sequentially. While that is certainly true, that definition doesn’t provide much insight into why functions are useful. Let’s update our definition: A function is a reusable sequence of statements designed to do a particular job. …
Data and values In lesson , you learned that the majority of instructions in a program are statements, and that functions are groups of statements that execute sequentially. The statements inside the function perform actions that (hopefully) generate whatever result the program was designed to produce. But how do programs …
A is a programmer-readable note that is inserted directly into the source code of the program. Comments are ignored by the compiler and are for the programmer’s use only. In C++ there are two different styles of comments, both of which serve the same purpose: to help programmers document the …
Chapter introduction Welcome to the first primary chapter of these C++ tutorials! In this chapter, we’ll take a first look at a number of topics that are essential to every C++ program. Because there are quite a few topics to cover, we’ll cover most at a fairly shallow level (just …
Before we can write our first program, we need to learn how to create new programs within our Integrated Development Environment (IDE). In this lesson, we’ll cover how to do that, and you’ll also compile and execute your first program! To write a C++ program inside an IDE, we typically …
An is a piece of software designed to make it easy to develop, build, and debug your programs. A typical modern IDE will include: Some way to easily load and save your code files. A code editor that has programming-friendly features, such as line numbering, syntax highlighting, integrated help, name …
Before we can write and execute our first C++ program, we need to understand in more detail how C++ programs get developed. Here is a graphic outlining a simplistic approach: Step 1: Define the problem that you would like to solve This is the “what” step, where you figure out …
The C language was developed in 1972 by Dennis Ritchie at Bell Telephone laboratories, primarily as a systems programming language (a language to write operating systems with). Ritchie’s primary goals were to produce a minimalistic language that was easy to compile, allowed efficient access to memory, produced efficient code, and …
Modern computers are incredibly fast, and getting faster all the time. However, computers also have some significant constraints: they only natively understand a limited set of instructions, and must be told exactly what to do. A computer program is a sequence of instructions that directs a computer to perform certain …
Welcome to the Learn C++ tutorials! Above all else, these tutorials aim to make learning C++ easy. Unlike many other sites and books, these tutorials don’t assume you have any prior programming experience. We’ll teach you everything you need to know as you progress, with lots of examples along the …
