Returns the length of the maximum initial segment (span) of the null-terminated byte string pointed to bydest, that consists of only the characters found in the null-terminated byte string pointed to bysrc.

The behavior is undefined if eitherdest orsrc is not a pointer to a null-terminated byte string.

[edit]Parameters

[edit]Return value

The length of the maximum initial segment that contains only characters from the null-terminated byte string pointed to bysrc.

[edit]Example

#include <stdio.h>#include <string.h> int main(void){constchar* string="abcde312$#@";constchar* 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);}

After skipping initial lowercase letters from 'abcde312$#@'The remainder is '312$#@'

[edit]References

[edit]See also

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