c++程序设计课后习题第4章答案(国外英文资料).docVIP

c++程序设计课后习题第4章答案(国外英文资料) Fill in the blanks 1., this question has consulted some experts, answer as follows: the pointer of the class object can access the address of the class data member and member function, but cannot not take, namely can not assign Data members, member functions 2. class, return type, 1 3.fun:: fun (Fun ), fun:: fun (const, fun ); Two, individual choice questions 1.C 2.C 3., no answer, should be A:: ~A (void), or A:: ~A () 4.B 5.C 6.C 7.D Three, error correction problem One #include iostream Using namespace std; Class base { Int *p; Public: Base (int, a) { The use of delete / destructor, so we must use new P=new int (a); } Int, Getx () { //m is not defined, only *p can return Return *p; } ~base () { This topic / / less of a semicolon Delete p; } }; Void, main () { Int a=3; Base B (a); Coutb.Getx (); } Two #include iostream Using namespace std; Class Point { Int x; Public: Void init (int a) {Setx (a)} Int, Getx (), {return, X;} The //Setx (int) function does not need return values, so it is changed to void Void Setx (int a) { X=a; } }; Void, main () { Point A; //A is not defined; add this line A.init (24); the //init (int) function has only one argument Cout A.x=, A.Getx () endl; } Four. Complete the procedure One #include iostream Using namespace std; Class base { Private: Int x; Int y; Public: Void init (int, a, int, b) { X=a; Y=b; } Void, print () { Cout 2*, x -, y = (2*x-y) endl; } }; Void, main () { Base a; A.init (68,55); A.print (); } Two Point:: Point (int, a, int, b) { M=a; N=b; } Point:: Point (Point T) { M=t.m; N=t.n; } Five, program analysis questions One No result, because there is no main function If the main function is added Void, main () { Base B (10, 20); } Output: Initializing... 10,20 Destory... 10,20 Two Output: Fifty-five Six, programming problems 1., design a point class Point, and then design a rectangular class, rectangular class using the Point class of two coordinate points as the diagonal vertex of the rectangle. And