#include <stdio.h>


void
test1(void)
{
	char *sp;
	char s[] = "str";
	sp = s;
	printf("sp: %s\n", sp);
	printf("s: %s\n", s);

	int a = 513;
	int *ap = &a;
	int **app = &ap;
	printf("a: %d\n", a);
	printf("ap: %d\n", *ap);
	printf("app: %d\n", **app);
}

void
test2()
{
	char *str = "abc";
	
	printf("for:\n");
	for (unsigned int i = 0; i < 3; i += 1)
	{
		printf("%c\n", str[i]);
	}
	
	printf("---\nwhile:\n");
	while(*str)	{
		printf("%c\n", *str++);
	}
	
}

int main(void)
{
  test1();
  test2();

	return 0;
}