Problem 2.1: Is the following piece of C code valid?

int main()
{
	int *steve;
	steve = &steve;
	return 0;
}

[Solution]

Problem 2.2: What is wrong with the following code?

int main()
{
	int *steve;
	*steve = 100;
	printf("%d\n", *steve);
	return 0;
}

[Solution]

Problem 2.3: Will the following code compile and run?

int main()
{
	int a = 5;
	a = *&*&*&*&a;
	printf("a is %d\n", a);
	return 0;
}

[Solution]

Problem 2.4: Will the following code compile and run?

int main()
{
	int a = 5;
	a = **&&a;
	printf("a is %d\n", a);
	return 0;
}

[Solution]

Problem 2.5: Why do we care about assigning the value NULL to a pointer when the pointer isn't being used? [Solution]