int length(char *s)
{
	int i, count = 0;
	for(i = 0; 1; i++)
	{
		if(s[i] == '\0')
			break;
		else
			count++;
	}
	return count;
}

int main()
{
	int n1, n2, n3, n4;
	n1 = length("abc");	// n1 should be 3
	n2 = length("abc\0");	// n2 should be 3
	n3 = length("abc\0\0");	// n3 should be 3
	n4 = length("abc\\0");	// n4 should be 5

	printf("[%d, %d, %d, %d]\n", n1, n2, n3, n4);
}