relibc/tests/string/strcspn.c

#include <string.h>
#include <stdio.h>
#include <stdlib.h>

int main(void) {
	char *world = "world";
	printf("%ld\n", strcspn("hello", world)); // should be 2
	printf("%ld\n", strcspn("banana", world)); // should be 6

    return EXIT_SUCCESS;
}