下面程序段的输出结果是______。 public class Test{ public static void main(String args[ ]){ int x,y; x=(int)Math.sqrt(5/2)+(int)Math.random( )*5/2; y=(int)Math.sqrt(3/2)+(int)Math.random( )*3/2; if(x>y) System.out.println("x>y"); else if(x==y) System.out.println("x=y"); else System.out.println("x<y"); } }
A.x>y
B.x=y
C.x<y
D.编译错误
第1题:
下列程序的运行结果是【 】。
include <iostream. h>
class SomeClass
{
public:
SomeClass(int value) { some_value=value;};
void show_data(void) { cout<<data<<"<<~some_value<<endl; };
static void set_data(int value) {data=value; }
private:
static int data;
int some_value
};
int SomeClass::data
void main(void)
{
SomeClass my_class(1001),your_class(2002);
your_class. set_data(4004);
my_elass. show_data()
}
第2题:
下面程序段的输出结果是( )。 public class Test { public static void main (String[] args) { int j=2,i=5; while (j<i--) j++; System.out.println(j);} }
A.2
B.3
C.4
D.5
第3题:
下面程序的运行结果是【 】。
inChlde<iOStream>
using namespace std;
class count
{
static int n;
public:
count()
{
n++;
}
static int test()
{
for(int i=0:i<4;i++)
n++;
return n;
}
};
int count::n=0;
int main()
{
cout<<COUnt::test()<<" ";
count c1, c2;
cout<<count::test()<<end1;
return 0;
}
第4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5题:
下面程序输出的结果是【 】。
include <iostream>
using namespace std;
class A {
public:
virtual void show() {cout<<"A!";
};
class B: public A {
public:
void show() {cout << "B!";}
};
class C: public B{
public:
void show(){cout << "C!";}
};
void show_info(A &i) {i. show();}
void main() {
A ia; B ib; C ic; show_info(ia);show_info(ib); show_info(ic); }
第6题:
如下程序的输出结果是 #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; }
A.n=0
B.n=1
C.n=2
D. n=3
第7题:
下面程序段中的错误语句是 ______。 class M{ int i; public: void ~AA(int); AA *p; void AA(); void AA(int x){i=x;}; };
A.AA *p;
B.void ~AA(int);
C.void AA(int);
D.void AA(int x){i=x;};
第8题:
下面程序输出的结果是【 】。
include <iostream>
using namespacc std;
class A {
public:
void show(){tout<<"A!";}
};
class B: public A{
public:
virtual void show(){cout<<"B!";}
};
class C: public B{
public:
virtual void show(){cout<<"C!";}
};
void show_info(A *i){i->show();}
void main(){
A ia;B ib;C ic;show_info(&ia); show_info(&ib);show_info(&ic);
}
第9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10题: