有如下程序:include usingnamespacestd:class Test{public: Test(){n£«=2; ~Test(){n£­

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；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<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 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 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 x{protected: int a;public: x() {a=有如下程序： #include ＜iostream＞ using namespace std; Class x { protected: int a; public: x() { a=1; } }; class x1 : virtual public x { public: x1() { a+=1; cout＜＜A．1B．123C．242D．244

[单选题]有如下程序:include using namespace std;class AA{public: virtual void f() {cout<有如下程序: #include ＜iostream＞ using namespace std; class AA { public: virtual void f() { cout＜＜ "AA"; } }; class BB : public AA { public: BB() { cout ＜＜ "BB"; } }; claA．AAB．AA

[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:virtual void f1(){cout<有如下程序#include ＜iostream＞using namespace std;class base{public: virtual void f1() { cout＜＜"F1Base "; } virtual void f2() { cout＜＜"F2Base "; }};class derive: public base{ voi

[单选题]有如下程序:include using namespace std;class Base{private:charc;public:Base(cha有如下程序：#include ＜iostream＞using namespace std;class Base{private: char c;public: Base(char n) :c(n){} ～Base() { cout＜＜c; } };class Derived: public Base{private: char c; public: