Strspn&strcspn

size_t  strspn  ( const  char  *s, const  char  * accept);STRSPN returns the first word Poute in s that is not present in the accept. Returns An integer value specifying the length of the substring in str This consists entirely of characters in c16> strcharset . If str begins with a character not in strCharSet , the function returns 0. accept can contain multiple characters, start a search from STR, and calculate the subscript for any of the characters contained in the Accept in Str.

#include <string.h>#include<stdio.h>Main () {Char*str="Linux is first developed for 386/486-based PCs."; printf ("%d\n", Strspn (str,"Linux")); printf ("%d\n", Strspn (str,"/-")); printf ("%d\n", Strspn (str,"1234567890"));}

Operation Result:

5

0

0

size_t strcspn (const char *s, const char * reject);strcspn () computes successive characters from the beginning of the argument s string, which are not in the string that the parameter reject refers to.simply put, if STRCSPN () returns a value of n, it means that the string s starts with n characters and does not contain characters within the string reject.returns the number of characters in the string reject that are not contained in string s at the beginning.

#include <string.h>Main (void) {     Char*str ="Linux is first developed for 386/486-based PCs."; printf ("%d\n", Strcspn (str," ")); printf ("%d\n", Strcspn (str,"/-")); printf ("%d\n", Strcspn (str,"1234567890")); } 

Operation Result:

5

33

30

Strspn&strcspn