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_5

5. Loops, Input, and char

Will Briggs¹  

(1)

Lynchburg, VA, USA

 

In this chapter, we’ll look at repeated actions, input, and things to do with the character type.

Keyboard input

Consider this code:

int ageInYears;

sout << "How old are you? "; ssin >> ageInYears;

This prints the query about age, then waits for keyboard input. If the user enters a number, that number is stored in ageInYears. (Anything else is likely to give ageInYears a 0 value.) ssin ¹ waits for you to press Enter before it processes input, so backspacing is allowed.

ssin uses the same font and cursor as sout; they are both part of SSDL.

You may note how the << arrows go: with sout, they go from ...