strcspn

Name

strcspn
- search a string for a set of characters

Library

libc.lib

Synopsis

#include <string.h>

size_t strcspn (const char *s, const char *charset);

Return values

The strcspn function returns the number of characters spanned.

Detailed description

The strcspn function spans the initial part of the null-terminated string s as long as the characters from s do not occur in string charset (it spans the complement of charset). In other words, it computes the string array index in s of the first character of s which is also in charset, else the index of the first null character.

Examples

#include <string.h>
#include <stdio.h>
int main()
{
    printf("Number of characters present in s\n which are not in charset is %d",strcspn("abcde","df"));
    return 0;
}

Output

Number of characters present in s
 which are not in charset is 3

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