Returns the length of the maximum initial segment (span) of the null-terminated byte string pointed to by dest, that consists of only the characters found in the null-terminated byte string pointed to by src.
The behavior is undefined if either dest or src is not a pointer to a null-terminated byte string.
[edit] Parameters dest - pointer to the null-terminated byte string to be analyzed src - pointer to the null-terminated byte string that contains the characters to search for [edit] Return valueThe length of the maximum initial segment that contains only characters from the null-terminated byte string pointed to by src.
[edit] Example#include <stdio.h>
#include <string.h>
int main(void)
{
const char* string = "abcde312$#@";
const char* low_alpha = "qwertyuiopasdfghjklzxcvbnm";
size_t spnsz = strspn(string, low_alpha);
printf("After skipping initial lowercase letters from '%s'\n"
"The remainder is '%s'\n", string, string + spnsz);
}
Output:
After skipping initial lowercase letters from 'abcde312$#@' The remainder is '312$#@'[edit] References
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