不能通过编译
输出:count 1 =10 count 2=9
输出:count 1=9 count 2=9
第1题:
如下程序的输出结果是( )。 public class Test { void printValue(int m) { do { System.out.println("The value is"+m); } while( --m>10) } public static void main(String args[]) { int i=10; Test t=new Test(); t.printValue(i); } }
A.The value is 8
B.The value is 9
C.The value is 10
D.The value is 11
第2题:
( 35 )有如下程序:
#include <iostream>
using namespace std;
Class B{
public:
B(int xx):x(xx) {++cout; x+=10;}
virtual void show() const
{cout<<count<< ' _ ' <<x<<endl;}
protected:
static int count;
private:
int x;
};
class D:public B{
public:
D(int xx,int yy):B(xx),y(yy) {++count; y+=100;}
virtual void show() const
{cout<<count<< ' _ ' <<y<<endl;}
private:
int y;
};
int B::count=0;
int main(){
B *ptr=new D(10,20);
ptr->show();
delete ptr;
return 0;
}
运行时的输出结果是
A ) 1_120
B ) 2_120
C ) 1_20
D ) 2_20
第3题:
有如下程序: #include using name space std; classB{ public: B(int xx):x(xx){++count;x+=10;} virtual void show()const {cout<<count<<'_'<<x<<endl;} protected: static int count; private: intx; }; class D:publicB{ public: D(int xx,int yy):B(xx),y(yy){++count;y+=100;} virtual void show()const {cout<<count<<'_'<<y<endl}; pnvate: inty; }; int B::count=0; intmain(){ B*ptr=new D(10,20); ptr->show(); delete ptr; return 0; } 运行时的输出结果是( )。
A.1_120
B.2_120
C.1_20
D.2_20
第4题:
下列程序的执行结果是 ( ) public class Test { public int aMethod() { satic int i=0; i++; System.out.println(i); } public static void.main(String args[]) { Test test=new Test(); test.aMethod(); }
A.编译错误
B.0
C.1
D.运行成功,但不输出
第5题:
下列代码的执行结果是public class Test{ public int aMethod(){ static int i=0; i++; System.out.println(i); } public static void main(String args[]){ Test test= new Test(); test. aMethod(); }}
A.编译错误
B.0
C.1
D.运行成功,但不输出
第6题:
有如下程序: #include<lostreanl> using namespace std; elass MyClass{ public: MyClass( ){++count;} ~MyClass( ){--count;} static int getCount( ){return count;} private: static int count; }; int MyClass::count=0; int main( ){ MyClass obj; cout<<obj.getCount( ); MyClass*ptr=new MyClass; cout<<MyClass::getCount( ); delete ptr; cout<<MyCiass::getCount( ); return 0; } 程序的输出结果是
A.121
B.232
C.221
D.122
第7题:
有如下程序: #include<iostream> using namespace std; class MyClass{ public: MyClass(){++count;} ~MyClass(){--count;} static int getCount(){return count;} private: static int count; }; int MyClass::count=0; int main(){ MyCl
A.121
B.232
C.221
D.122
第8题:
有如下程序: #inClude<iostream> using namespaCe耐: Class MyClass{ publiC: MyClass{++Count;} ~MyClass{--Count;} statiC int getCount{retum Count;} private: statiC int Count; }; ‘ int MyClass::Count=0; int main { MyClass obj; Cout<<obj.getCount; MyClass+ptr=new MyClass: Cout<<MyClass::9etCount; ’delete ptr; Cout<<MyClass::9etCount; return 0; } 执行这个程序的输出结果是( )。
A.121
B.232
C.221
D.122
第9题:
下列程序的输出结果是______。 #include<iostream> using namespace std; class Test( public: Test() {cnt++;} ~Test() {cnt--;} static int Count(){return cnt;} private: static int cnt; }; int Test::cnt=0; int main() { cout<<Test::Count()<<""; Test t1,t2; Test*pT3=new Test; Test*pT4=new Test; cout<<Test::Count()<<""; delete pT4; delete pT3; cout<<Test::Count()<<end1; return 0; }
A.024
B.042
C.420
D.240
第10题:
编译如下的Java程序片段: Class test{ Int count=9; Public void a(){ Int count=10; System.out,println(“count 1=” + count); } Public void count(){ System.out.println(“count 2 =”+ count); } Public static void main(String args[] ){ Test t=new Test(); t.a(); t.count(); } } 结果是()
第11题:
public class Test { public int aMethod() { static int i = 0; i++; return i; } public static void main (String args[]) { Test test = new Test(); test.aMethod(); int j = test.aMethod(); System.out.println(j); } } What is the result?()
第12题:
不能通过编译
输出:count 1 =10 count 2=9
输出:count 1=9 count 2=9
第13题:
下面程序的正确输出是( )。 public class Hello { public static void main(String args[]) { int count, xPos=25; for ( count=1; count<=10; count++ ) { if ( count==5 ) break; System.out.println(count ); xPos += 10; } } }
A.1 2 3 4
B.1 3 4
C.编译错误
D.以上都不是
第14题:
有如下程序: #include <iostream> using namespace std; class MyClass { public: MyClass() { ++count; } ~MyClass() { --count; } static int getCount() { return count; } private: static int count; }; int MyClass::count=0; int main() { MyClass obj; cout<<obj.getCount(); MyClass *ptr=new MyClass; cout<<MyClass::getCount(); delete ptr; cout<<MyClass::getCount(); return 0; }程序的输出结果是
A.121
B.232
C.221
D.122
第15题:
下面程序的运行结果是【 】。
include <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 = O;
int main()
{
cout<<count:: test()<<" ";
count c1, c2;
cout<<count:: test()<<endl;
return 0;
}
第16题:
如下两个源程序文件,分别编译后,运行Example.class文件,运行结果为______。
AB.java文件代码如下;
package test;
public class AB
{
int a=60;
public void show()
{
System.out.println(”a=”+a);
}
Example.java文件代码如下:
import test.AB;
class Example
{
public static void main(String args[])
{
AB bj=new AB();
obj.show();
}
}
第17题:
有如下程序:
include<iostream>
using namespace std;
class pumpkin{
public:
pumpkin(){++count;}
~pumpkin(){--count;}
static void total_count(){
cout<<count<<"pumpkin(s)"<<end1;
}
private:
static int count;
};
int pumpkin::count=0;
int main(){
pumpkin p1[10];
pumpkin::total_count();
return 0;
}
这个程序的输出结果是______。
第18题:
有以下程序: #include <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; } 执行后的输出结果是( )。
A.4 10
B.1 2
C.22
D.24
第19题:
有如下程序: #include<iostream> using namespace std; class Toy{ public: Toy(char*_n){strcpy(name,_n);count++;} ~Toy(){count--;} char*GetName( ){return name;} static int getCount( ){return count;} private: char name[10]; static int count; }; int Toy::count=0: int main( ){ Toy tl("Snoopy"),t2("Mickey"),t3("Barbie"); cout<<t1.getCount( )<<endl; return 0; } 程序的输出结果是
A.1
B.2
C.3
D.运行时出错
第20题:
下列程序的输出结果是( )。 public class Test { void printValue(int m) { do{ System.out.println("The value is"+m) } while(--m>10) } public static void main(String args[]) { int i=10; Test t=new Test: t.printValue(i); } }
A. The value is 8
B.The value is 9
C.The value is 10
D.The value is 11
第21题:
以下程序调试结果为:
public class Test {
int m=5;
public void some(int x) {
m=x;
}
public static void main(String args []) {
new Demo().some(7);
}
}
class Demo extends Test {
int m=8;
public void some(int x) {
super.some(x);
System.out.println(m);
}
}
A.5
B.8
C.7
D.无任何输出
E.编译错误
第22题:
编译如下Java程序片断: class test{ int count = 9; public void a(){ int count=10; System.out.println("count 1 =" + count); } public void count(){ System.out.println("count 2 =" + count); } public static void main(String args[]){ test t=new test(); t.a(); t.count(); } } 结果将()。
第23题:
public class NamedCounter { private final String name; private int count; public NamedCounter(String name) { this.name = name; } public String getName() { return name; } public void increment() { coount++; } public int getCount() { return count; } public void reset() { count = 0; } } Which three changes should be made to adapt this class to be used safely by multiple threads? ()
第24题:
不能通过编译
输出: count 1 = 10 count 2 = 9
输出: count 1 = 9 count 2 = 9