C++20 for Lazy Programmers: Quick, Easy, and Fun C++ for Beginners

© Will Briggs 2021

W. BriggsC++20 for Lazy Programmershttps://doi.org/10.1007/978-1-4842-6306-8_13

13. Standard I/O and File Operations

Will Briggs¹  

(1)

Lynchburg, VA, USA

 

We’ve had too much fun. It’s time to get serious.

Or maybe it’s time to learn how to program when you aren’t using a graphics and game library. After all, you usually aren’t. Even if you are, you may need to access files (for loading a game level, say), and in C++ we handle files much as we do text-based user interaction – what we’ve done till now with sin and sout.

Standard I/O programs

Example 13-1 is a program that uses standard I/O. It may look familiar.

// Hello, world! program

//      -- from _C++20 for Lazy Programmers_

// It prints "Hello, world!" on the screen.

//   Quite an ...