有如下程序：#include ＜iostream＞using namespace std:class Test{public: Test() {n+=2; ～Test() {n-=3; ; static int getNum() {return n;}privaue: static int n:};int Test::n=1;int main(){ Test* p=new Test; delete p; cout＜＜"n="＜＜Test::getNum()＜＜end1; return 0;} 执行后的输出结果是
A．n=0
B．n=1
C．n=2
D．n=3
[单选题]有如下程序：include<iostream>usingnamespacestd；classC1{public：～C1（ ）{cout＜＜1；)}；classC2：publicC1{public：～C2（ ）{cout＜＜2；)}；intmain（ ）{C．2cb2；C．1*cb1：return0；}运行时的输出结果是（ ）。A．121B．21C．211D．12
[单选题]有如下程序：include<iostream>usingnamespacestd；classXA{inta；public：staticintb；XA(intaa)：a(aa){b＋＋；}～XA（ ）{}intget（ ）{returna；}}；intXA：：b=0intmain（ ）{XAd1(1)，d2(3)；cout＜＜d1．get（ ）+d2．get（ ）＋XA：：b＜＜endl；return0；}运行时的输出结果是（ ）。A．5B．6C．7D．8
[单选题]有如下程序：include<iostream>usingnamespacestd；classAA{public；A．A（ ）{cOUt＜＜1；)}；classBB：publicAA{intk；public：B．B（ ）：k(0){tout＜＜12；}B．B(intn)：k(n)(cout＜＜3；)}；intmain（ ）{B．Bb(4)，c；return0；}运行时的输出结果是（ ）．A．1312B．132C．32D．1412
[单选题]有如下程序: include class x { protected: int a; public:x(){ a=1;} }; class x有如下程序： #include ＜iostream.h＞ class x { protected: int a; public: x() { a=1; } }; class x1 : virtual public x { public: x1() { a+=1; cout＜＜a; } }; class x2 : virtual public x { pu
[单选题]有如下程序:include using namespace std;class BASE{public:~BASE(){cout<<"BASE";}有如下程序： #include ＜iostream＞ using namespace std; class BASE{ public: ～BASE(){cout＜＜"BASE";} }; class DERIVED:public BASE{ public: ～DERIVED(){cout＜＜"DERIVED";} }; int main(
[单选题]有如下程序:include using namespace std;class Base{public:Base(){ cout<<"BB";有如下程序： #include ＜iostream.h＞ using namespace std; class Base { public: Base(){ cout＜＜"BB"; f(); } voidf(){cout ＜＜"Bf"; } }; class Derived: public Base { public: Derived (){c
[单选题]有如下程序: include using namespaee std;class Animal{ public: virtual char*g有如下程序：include＜iostream＞using namespaee std；c lass Animal{public：virtual char*getType( )const{return"Animal"；}virtual char*getVoice( )const{return"Voice"；}}；class Dog：public An
[单选题]有如下程序:include using namespace std;class point{intx,y;public:point( int vx,有如下程序：#include ＜iostream＞using namespace std;class point{ int x, y;public: point( int vx, int vy ) { x = vx; y = vy; } point ( ) x = 0; y= 0; } point operator+( point p1 ) { po
[单选题]有如下程序;include using namespace std;class Base{public;Base(inti){x=i;}void d有如下程序; #include ＜iostream＞ using namespace std; class Base { public; Base(inti){x=i;} void dispa0{cout＜＜x＜＜',';} private; int x; }; class Derived;public Base { public; Derive
[单选题]有如下程序:include using namespace std;class A {public: A() {cout<<"A";}};class有如下程序: #include ＜iostream＞ using namespace std; class A { public: A() {cout＜＜"A";} }; class B {public:B() {cout＜＜"B";}}; class C: public A { Bb; public: C() {cout＜＜"C";