Format
#include <wcstr.h> size_t wcscspn(const wchar_t *string1, const wchar_t *string2);
Language Level: XPG4
Threadsafe: Yes.
Description
The wcscspn() function determines the number of wchar_t characters in the initial segment of the string pointed to by string1 that do not appear in the string pointed to by string2.
The wcscspn() function operates on null-ended wchar_t strings; string arguments to this function should contain a wchar_t null character marking the end of the string.
Return Value
The wcscspn() function returns the number of wchar_t characters in the segment.
Example that uses wcscspn()
This example uses wcscspn() to find the first occurrence of any of the characters a, x, l, or e in string.
#include <stdio.h> #include <wcstr.h> #define SIZE 40 int main(void) { wchar_t string[SIZE] = L"This is the source string"; wchar_t * substring = L"axle"; printf( "The first %i characters in the string \"%ls\" are not in the " "string \"%ls\" \n", wcscspn( string, substring), string, substring ); } /**************** Output should be similar to: ****************** The first 10 characters in the string "This is the source string" are not in the string "axle" */
Related Information
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