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

main()
{
	char *s = "hello, world. wow!";

	printf("%s\n", s);
	printf("%s --- index(s, 'o')\n", index(s, 'o'));
	printf("%s --- rindex(s, 'o')\n", rindex(s, 'o'));
	printf("%s --- strchr(s, 'o')\n", strchr(s, 'o'));
	printf("%s --- strrchr(s, 'o')\n", strrchr(s, 'o'));
	printf("%s --- strstr(s, \"wo\")\n", strstr(s, "wo"));
	printf("%s --- strpbrk(s, \"world\") --- /[world]/\n", strpbrk(s, "world"));
	printf("%d --- strspn(s, \"world\") --- /[^world]/\n", strspn(s, "world"));
	printf("%d --- strcspn(s, \"world\") --- /[world]/\n", strcspn(s, "world"));

	exit(0);
}