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10
CHAPTER 2 OPERATION
source file name is .c, line number specification can be omitted. If the source file name is not alphanumeric
characters, enclose the line number in double quotes.
■ Character constant
A character constant is the character value enclosed in a single quote; it cannot include a single quote and \.
Instead of these characters (single quote and back slash), escape characters can be used as character
constants. Characters that can constitute character strings can be used as escape characters.