Sams Teach Yourself C++ in 21 Days

55:

56: tmp = rX;

57: rX *= rX;

58: rX = rX * tmp;

59:

60: tmp = rY;

61: rY *= rY;

62: rY = rY * tmp;

63: }

64:

65: void Swap(int & rX, int & rY)

66: {

67: int temp;

68: temp = rX;

69: rX = rY;

70: rY = temp;

71: }

72:

73: void GetVals (int & rValOne, int & rValTwo)

74: {

75: cout << “New value for ValOne: “;

76: cin >> rValOne;

77: cout << “New value for ValTwo: “;

78: cin >> rValTwo;

79: }

(0)Quit (1)Change Values (2)Square (3)Cube (4)Swap: 1

x: 1 y: 2

New value for ValOne: 2

New value for ValTwo: 3

x: 2 y: 3

(0)Quit (1)Change Values (2)Square (3)Cube (4)Swap: 3

x: 2 y: 3

x: 8 y: 27

(0)Quit (1)Change Values (2)Square (3)Cube (4)Swap: 2

x: 8 y: 27

x: 64 y: 729

(0)Quit (1)Change Values (2)Square (3)Cube (4)Swap: 4

x: 64 y: 729

x: 729 y: 64

(0)Quit (1)Change Values (2)Square (3)Cube (4)Swap: 0

On lines 5–8, four functions are declared, each with the same return type and sig-

nature, returning voidand taking two references to integers.

On line 13,pFuncis declared to be a pointer to a function that returns voidand takes

two integer reference parameters. Because the signatures match, any of the previous

OUTPUT

516 Day 15

LISTING15.5 continued

ANALYSIS