c++程序设计课后习题第6章答案（国外英文资料）.docVIP

c++程序设计课后习题第6章答案（国外英文资料） A, fills up the topic 1. The single inheritance 2. Private, protected, and the public Two, one choice 1. A. 2. A. 3. A. 4. D; Third, to change wrong topic 1. # include iostream Using namespace STD. The class base { Int m; Public: Base int a: m (a) {} / / the constructor in the original problem has no functional body Int Getx () {return m; } }; The class derived: private base { Public: Derived (int b) : base (b) {}; / / m (b) is supposed to assign m to b in the base class, and m is not defined in the derived class, so it should be base (b). }; Void main () { Derived a, (2). } Overloading the show () method in the Derived class to resolve the name conflict. # include iostream. H The class Base1 { Protected: Int m; Public: Void Show (). } }; The class Base2 { Protected: Int n; Public: Void Show (). } }; The class Derived: public Base1, public Base2 { Public: Void Set (int x, int y) {m = x; N = y; } Reload the show () method in the Derived class Void the Show () { Base1: : Show (); Base2: : Show (); } }; Void main () { Derived Obj. Obj. Set (45,87); Obj. The Show (); Obj. Base1: : Show () Obj. Base2: : Show (); } Four, programming problem Design a base class, derive columns from the base class, and design member functions to output their area and volume. # include iostream Using namespace STD. / / class, Basic base class { Protected: Double r; Public: Basic () {r = 0; } Basic (double a) : r (a) {} }; Class Circular: public Basic / / derived circles from the base class { Protected: Double area; Public: Circular (double a) { R = a; The area = area = area = 3.1415926 * r * r; } Double getArea () / / return circle area { The return area; } }; Class Column: public Circular / / derived cylindrical classes from the circle class { Protected: Double h; Double cubage; Public: Column (double a, double b) : Circular (a) { H = b; Cubage = getArea () * h; } Double getCubage () / / return cylinder volume function { Return cubage; } }; Void main () { Circ