下面程序执行后,输出的结果是( )。 public class Test { public static void main (String[] )args) { boolean m=true; if(m==false) System.out.println("假"); else if(m====true) System.out.println("真"); else System.out.println ("错误"); } }
A.真
B.假
C.错误
D.编译出错
第1题:
在下面程序的横线处填上适当的内容,使程序执行后的输出结果为ABCD。
include <iostream.h>
using namespace std;
class A
{
public: A() {cout<<'A';
};
class B:______
{
public: B() {cout<<'B';}
};
class C:______
{
public: C(} cout<<'C';}
};
class D:public B, public C
{
public: D(){cout<<'D';}
};
void main(){D obj;}
第2题:
有如下程序: #include <iostream> using namespace std; class Test { public: Test() {n+=2;} ~Test() {n-=3;} static int getNum(){retum n;} private: 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
第3题:
下面程序的结果是 #include<iostream.h> class test{ private: int num; public: test( ); int getint( ) {return num;} ~test( );}; test::test( ) { num=0;} test::~test( ) { cout<<"Destructor is active"<<endl;} void
A.Exiting main Destructor is active Destructor is active Destructor is active
B.Exiting main Destructor is active Destructoris active
C.Exiting main Destructoris active
D.Exiting main
第4题:
有如下程序: #include <iostream> using namespace std; class Test { public: Test() {n+=2; } ~Test() {n-=3; } static int getNum() {return n; } private: static int n; }; int Test::n=1; int main() { Test* p=new Test; delete p; cout<<"n="<<Test::getNum()<<endl; return 0; } 执行该程序的输出结果是( )。
A.n=0
B.n=1
C.n=2
D.n=3
第5题:
下面程序的输出结果是( )。 #include <iostream> using namespace std; class A { public: A( ) {cout<<"A";} } class B { public: B() {coat<<"B" ;} } class C: public A { public: B b; C() {cout<<"C";} } void mian(){ C c; }
A.CBA
B.ABC
C.ACB
D.BCA
第6题: