Returns the length of the prefix of a string that consists entirely
of characters from a set of characters.
Format
#include <string.h>
size_t strspn (const char *str, const char
*charset);
Arguments
- str
- A pointer to a character string. If this string is a null
string, 0 is returned.
- charset
- A pointer to a character string containing the characters for
which the function will search.
Description
This function scans the characters in the string, stops when
it encounters a character not found in charset, and returns
the length of the string's initial segment formed by characters
found in charset.
Return Value
| x | The length of the
segment. |
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