What is the main objective of a message that tells the receiver about a flew product tha
A.A. To inform
B.B. To request
C.C. To record
A.A. To inform
B.B. To request
C.C. To record
A.232
B.231
C.222
D.221
下面程序运行后,r的值是?() delegate int Call(int a, int b); static void Main(string[] args){ Call obj; obj = new Call(Add); obj += new Call(Sub); int r = obj (5, 3); } static int Add(int a,int b){return a+b;} static int Sub(int a,int b){return a-b;}
A、2
B、5
C、52
D、没有返回值
下列程序的执行结果是 () public class ex68{ public static void main(String[]args){ ex68 obj=new ex68(); int s=0; for(int i=1;i<=4;i++){ s+=obj.method(i); } System.out.println(s); } public int method(int n){ if(n==1) return 1; else return n*method(n-1); } }
A.3
B.9
C.33
D.153
include<iostream.h>
class A
{
public:
virtual void use() {cout<<"in A\n";}
};
class B:public A
{
public:
virtual void use() {cout<<"in B\n";}
};
class C:public B
{
public:
virtual void use(){cout$amp; };
void main()
{
A*obj;
bj=new C;
obj->use();
delete obj;
}
下列程序运行结果是 。 #include <iostream.h> class A { public: A() { cout << "A"; } }; class B { public: B() { cout << "B"; } }; class C : public A { public: C() { cout << "C"; } private: B b; }; void main() { C obj; }
有如下程序:#include <iostream>using namespace std;class Obj { static int i;public: Obj(){i++;} -Obj(){i--;} static int getVal(){return i;} };int Obj::i=0;void f(){Obj ob2; cout<<ob2.getVal(); }hat main(){ Obj ob1; f(); Obj *ob3=new Obj; cout<<ob3->getVal(); delete ob3; cout<<Obj:: getVal(); return (); }程序的输出结果是()。
A.232
B.231
C.222
D.221
A.0
B.1
C.2
D.3
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