#include<stdio.h>


// 2 points each:  What will each of the lines below print?
int main(){
	int x;
	printf("Size of x:  %d\n", sizeof(x)); 
	printf("Size of &x:  %d\n", sizeof(&x)); // Assume x86-64

	int *px;
	printf("Size of px:  %d\n", sizeof(px)); // Assume x86-64 again
	px = &x;
	printf("Size of *px:  %d\n", sizeof(*px)); // Assume x86-64 again

	printf("Size of *&*&*(&x):  %d\n", sizeof(*&*&*(&x))); 
	

	x = 500;
	printf("px = %lu (%p)\n", px, px); // This wouldn't be a fair question
	if(x > px)
		printf("beep\n");
	else
		printf("click\n");

	*px = 600;
	if(x < *px)
		printf("beep\n");
	else
		printf("click\n");

	if(sizeof(x) == sizeof(*px))
		printf("beep\n");
	else
		printf("click\n");

	int return_ten(){
		return 10;
	}
	int (*prt)() = return_ten;
	printf("sizeof(prt) = %d\n", sizeof(prt));
	printf("%p\n", prt); // not a fair question, you can't really know, it'll be kinda big but less than px
	printf("%d\n", prt());
	if(prt == return_ten)
		printf("beep\n");
	else
		printf("click\n");

	int A[10];
	int *pA = A;
	A[5] = 100;
	printf("pA[5] == %d\n", pA[5]); // This would be ok

	pA = prt; // This will yield a warning
	printf("%d\n", ((int (*)())pA)());

//	pA[0] = 500; // Why does this cause a problem?
//	prt(10);
	int (*return_return_ten())(){
		return return_ten;
	}
	printf("we got %d\n", return_return_ten()());
	if(return_return_ten() == return_ten)
		printf("beep\n");
	else
		printf("click\n");

	int take_return_ten(int (*rt)()){
		return rt();
	}
	printf("What this time?  %d\n", take_return_ten(return_return_ten()));

	char s[32];
	s[0] = 70;
	printf("s[0] = %d\n", s[0]);
	printf("s[0] = %c\n", s[0]); // not as fair, need to remember ASCII table
	s[0] = 72 + 512; // More CS250 than 430
	printf("s[0] = %d\n", s[0]);
	px = s;
	px[0] = 0x50505050; // Reminder:  0x50 is 80 in decimal
	printf("s[0] = %d\n", s[0]);
	s[4] = 0;
	printf("%s\n", s);
	s[0] = 0x70;
	printf("s[0] = %d\n", s[0] & 0x90);



	return 0;
}