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The C99 \[[ISO/IEC 9899:1999|AA. C References#ISO/IEC 9899-1999]\] function {{strtok()}} is a string tokenization function that takes two arguments: an initial string to be parsed and a const-qualified character delimiter. It returns a pointer to the first character of a token, or a null pointer if there is no token. |
The first time strtok() is called, the string is parsed into tokens, character delimiter. The strtok() function parses the string up to the first instance of the delimiter character, replaces the character in place with a null byte ('\0'), and returns the address of the first character in the token. Subsequent calls to strtok() begin parsing immediately after the most recently-placed null character.
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