23.4 Characters

Implementation-Defined Behavior for Characters is covered in section G.3.4 of the ANSI C Standard.

Detail any source and execution characters which are not explicitly specified by the Standard? (ISO 5.2.1)

None.

List escape sequence value produced for listed sequences. (ISO 5.2.2)  

Table 23-1. Escape Sequence Characters and Values
Sequence	Value
`\a`	7
`\b`	8
`\f`	12
`\n`	10
`\r`	13
`\t`	9
`\v`	11

How many bits are in a character in the execution character set? (ISO 5.2.4.2)

What is the mapping of members of the source character sets (in character and string literals) to members of the execution character set? (ISO 6.1.3.4)

The identity function.

What is the equivalent type of a plain char? (ISO 6.2.1.1)

Either (user defined). The default is signed char. A compiler command-line option may be used to make the default unsigned char.