下列程序的运行结果是______。 Class C14 implements Runnable { private int i; public C14(int n) { this.i = n; } public void run{) { try { Thread.currentThread().sleep(i); } catch(InterruptedException ie) { System.err.println(ie.tString()); } System.out.println("线程" + Thread.currentThread() .getName + "睡眠了" + i + "毫秒结束"); } } public class Testl4 { public static void main(String[] args) { Thread t = new Thread(new C14(300), "t"); t.start(); } }
A.线程t睡眠了300毫秒结束
B.线程Thread-0睡眠了300毫秒结束
C.线程t睡眠了i毫秒结束
D.线程Thread-0睡眠了i毫秒结束
第1题:
有以下程序: #include <iostream> using namespace std; class A { private: int x,y; public: void set (int i,int j) { x=i; y=j; } int get_y() { return y; } }; class box { private: int length,width; A label; public: void set(int 1,int w, int s,int p) { length=1; width=w; label.set(s,p); } int get_area() { return length*width; } }; int main() { box small; small.set(2,4,1,35); cout<<small.get_area()<<end1; return 0; } 运行后的输出结果是( )。
A.8
B.4
C.35
D.70
第2题:
若有以下程序:
include <iostream>
using namespace std;
class Sample
{
private:
const int n;
public:
Sample(int i) :n(i) {)
void print()
{
cout<<"n="<<n<<end1;
}
};
int main()
{
sample a(10);
a.print();
return 0;
}
上述程序运行后的输出结果是【 】。
第3题:
下列程序的运行结果是______。
include<iostream.h>
class Base
{
public:
virtual void func(int i){cout<<"class Base:"<<i<<end1;)
};
class Derived: public Base
{
public:
void func(double d){cout<<"class Derived:"<<d<<endl;}
};
void main( )
{
Base a,*p=a;
Derived b;
p=&b;
(*p).func(3.3);
}
第4题:
分析一下这段程序的输出(Autodesk)
class B
{
public:
B()
{
cout<<"default constructor"<<endl;
}
~B()
{
cout<<"destructed"<<endl;
}
B(int i):data(i) //B(int) works as a converter ( int ->
instance of B)
{
cout<<"constructed by parameter " << data <<endl;
}
private:
int data;
};
B Play( B b)
{
return b ;
}
(1) results:
int main(int argc, char* argv[]) constructed by
parameter 5
{ destructed B(5)形参析构
B t1 = Play(5); B t2 = Play(t1); destructed t1形
参析构
return 0;
destructed t2 注意顺序!
} destructed t1
(2) results:
int main(int argc, char* argv[]) constructed by
parameter 5
{ destructed B(5)形参析构
B t1 = Play(5); B t2 = Play(10); constructed by
parameter 10
return 0;
destructed B(10)形参析构
} destructed t2 注意顺序!
destructed t1
第5题:
若有以下程序: #include <iost ream> using namespace std; class A { private: int a; public: A(int i) { a=i; } void disp () { cout<<a<<", "; } }; class B { private:
A.10,10,10
B.10,12,14
C.8,10,12
D.8,12,10
第6题:
下列程序的运行结果是______。
include<iomanip.h>
int Func(int *a,int n)
{int s=1;
for(int i=0;i<n;i++)
s*=*a++;
returns;}
void main()
{inta[]:{1,2,3,4,5,6,7,8};
intb=Func(a,6)+Func(&a[5],2);
cout<<“b=“<(b<<endl;}