Chapter 9 Quiz Practice

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

If p1 is an integer pointer that is pointing to memory location 1001, and an integer takes 4 bytes, then (p1+1) evaluates to

1005.

What is the output of the following code? int *p1, *p2; p1 = new int; p2 = new int; *p1=11; *p2=0; p2=p1; cout << *p1 <<" " << *p2 << endl;

11 11

What is the output of the following code fragment? int v1=2, v2=-1, *p1, *p2; p1 = & v1; p2= & v2; p2=p1; cout << *p2 << endl;

2

What is the output of the following code fragment? float *p1; p1 = new float(3); cout << *p1;

3.0

If two pointer variables point to the same memory location, what happens when one of the pointers is freed?

A and C

Assuming that the pointer variable p1 is of the correct type and size is an integer with some value > 1, which of the following declarations are legal?

A, B, and C

If p1 and p2 are both pointers that point to integers in memory, the condition p1==p2 will be true if the values that are in those memory locations are the same.

False

The size of dynamic arrays must be declared at compile time.

False

int *p1; declares a static variable.

False

Dynamically created variables have no name.

True

You can assign an array to a pointer variable.

True

1 out of 1 points Given that p1 is a pointer variable of the string class, which of the following are legal statements?

cout << *p1;

Which of the following statements correctly prints out the value that is in the memory address that the pointer p1 is pointing to?

cout << *p1;

Which of the following correctly declare 3 integer pointers?

int *p1, *p2, *p3;

If a program requires a dynamically allocate two-dimensional array, you would allocate the memory by using

p1 = new int*[numRows]; for(int i=0; i < numRows; i++) p1[i] = new int[numColumns];

Which of the following correctly declares a dynamic array of strings?

p1 = new string[13];

Which of the following assigns to p1 the pointer to the address of value?

p1=&value;

Which of the following correctly declares a user-defined data type that defines a pointer to a float?

typedef float* floatPtr;

Given that a typedef for IntPtr defines a pointer to an integer, what would be the correct declaration for a function that expects a reference to an integer pointer?

void f1 (IntPtr& ptr);

Given that p1 is an integer pointer variable, and ā is an integer array, which of the following statements are NOT legal code?

ā1 = p1;


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