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Digit

As explained in Learn C++ by Example

A digit is a single numerical symbol used to represent a place in a positional numeral system.

A digit is a single numerical symbol used to represent one place in a positional numeral system. In a number-guessing game, digits can be compared individually to show exact and misplaced matches. section 3.3.4 section 3.0

Digit clues

Comparing 87739 with the hidden number produces “^^**.” A star marks a digit in the correct place, a caret marks a misplaced digit, and a dot marks an absent digit. Duplicate digits are consumed once so the clue does not overstate matches. section 3.3.4

87739
^^**.

Use the displayed guess and clue as a compact example of position-by-position digit feedback. section 3.3.4

How Learn C++ by Example covers it

How deep it goes
Explains exact and misplaced matching with two loops, formatting, and duplicate handling.
Examples
Uses guesses 87739, 11779, 23471, and 01723 to demonstrate exact, misplaced, absent, and duplicate digits.
What it assumes
Introduces digit handling while practicing number and string input.
What you can do after
Build it from scratch with a function that returns digit-match clues for a number and a guess.
How it connects
Connects digits with numbers, strings, input handling, and number-guessing games.
Cover of Learn C++ by Example
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Related concepts

This explainer was generated by Manning's knowledge graph from the text of Learn C++ by Example. The section links point to the parts of the book it draws on.