Strcspn
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strcspn is the function from c standard library (header file string.h).
It search the string for certain set of characters.
The strcspn() function calculates the length of initial segment of string1 which does not contain any character from sting2.
Return Value
This function returns the index of first character in string1 that matches with any character of string2.
Syntax
#include <string.h>
size_t strcspn( const char *str1, const char *str2 );
Example
<source lang="c"> #include <stdio.h>
#include <string.h>
int main()
{
char s[20] = "wikireader007", t[11] = "0123456789";
printf("The first decimal digit of s is at position: %d.\n", strcspn(s, t));
return 0;
}
Output:
The first decimal digit of s is at position: 10