Multiple Answer Question

Given the following declarations:

struct House

{

double price;

int rooms;

};

House *ptr = new House;

which of the following is (is) valid?

		(a). *ptr.rooms = 5;
		(b) ptr->price = 200000;
		(c) (*ptr)->price = 200000;
		(d) ptr.rooms = 5;
		(e). (*ptr).room = 5;

2.

Consider the following program:

struct A {

int a1;

double a2;

};

void change(char *ar, A aa)

{

strcpy(ar, HELLO);

aa.a1=10;

aa.a2=3.14;

}

int main()

{

A aa = {3, 2.5};

char ar[10] = " ";

change(ar, aa);

cout << aa.a1 << ' ' << aa.a2 << ' ' << aa.a3 << ar;

return 0;

}

what is the output?

		(a) 3 2.5 C++
		(b) 3 2.5 Hello
		(c) 10 3.14 C++
		(d) 10 3.14 Hello
		(e) None of above

3.

Assuming that ar is an array and ptr is a pointer to that array, which expression refers to the address of the 3rd element of the array?

		(a) *(ptr + 2)
		(b) ptr[2]
		(c) ptr+2
		(d) *(ar+2)
		(e) None of above

4.

Which of the following is the correct output of the following statements:

int sum = 5, x = 8, *ptr= &x;

sum += (*ptr)++;

cout << sum << " " << x << endl;

		(a) 14 8
		(b) 13 9
		(c) 14 9
		(d) 13 8
		(e) Compilation error