Problem 1
Mark the following statements as true or false. a. In C++, pointer is a reserved word. b. In C++, pointer variables are declared using the word pointer. c. The statement delete p; deallocates the variable pointer p. d. The statement delete p; deallocates the dynamic variable that is pointed to by p. e. Given the declaration: int list[10]; int *p; the statement: p = list; is valid in C++. f. Given the declaration: int *p; the statement: p = new int[50]; dynamically allocates an array of 50 components of type int, and p contains the base address of the array. g. The address of operator returns the address and value of its operand. h. If p is a pointer variable, then the statement p = p * 2; is valid in C++.
Problem 2
Given the following declaration: int num; int *ptr1; int *ptr2; double *ptr3; Mark the following statements as valid or invalid. If a statement is invalid, explain why. a. ptr1 = ptr2; b. num = ptr1; c. ptr3 = ptr1; d. *prt3 = *ptr2; e. *ptr1 = *ptr2; f. num = *ptr2; g. ptr1 = &ptr2 h. ptr1 = # i. num = &ptr1
Problem 4
Consider the following statement: int* p, q; This statement could lead to what type of misinterpretation?
Problem 5
Suppose that you have the declaration int *numPtr;. What is the difference between the expressions: *numPtr and &numPtr?
Problem 6
What is the output of the following C++ code? int x; int y; int *p = &x int *q = &y x = 35; y = 46; p = q; *p = 27; cout << x << " " << y << endl; cout << *p << " " << *q << endl;
Problem 7
Given the following statements: int num; int *numPtr; Write C++ statements that use the variable numPtr to increment the value of the variable num.
Problem 8
What is the output of the following C++ code? string *str; string fName, lName; str = &fName *str = "Miller"; str = &lName *str = "Tommy"; cout << fName << " " << lName << endl;
Problem 9
What is the output of the following C++ code? int num1; int num2; int *p = &num1 p = &num2 *p = 25; num1 = num2 + 6; p = &num1 num2 = 73; *p = 47; cout << *p << " " << num1 << " " << num2 << endl;
Problem 10
What is the output of the following C++ code? int *length; int *width; length = new int; *length = 5; width = length; length = new int; *length = 2 * (*width); cout << *length << " " << *width << " " << (*length) * (*width) << endl;
Problem 11
What is the output of the following C++ code? int *first = new int; int *second; *first = 85; second = first; *second = *second + *first; first = new int; *first = *second - 100; cout << *first << " " << *second << endl;
