《C#考試題》——代碼閱讀題.doc

C#應(yīng)用開發(fā)代碼閱讀題1閱讀下面的程序，并寫出執(zhí)行的結(jié)果。（10分）using System;interface Inter1void F();public class A : Inter1public virtual void F()Console.WriteLine(A.F);public class B : A public override void F()Console.WriteLine(B.F);public class C : B,Inter1new public virtual void F()Console.WriteLine(C.F);public class D : C,Inter1public override void F()Console.WriteLine(D.F);void Inter1.F()Console.WriteLine(D.F with Inter1);public class E : Dpublic override void F()Console.WriteLine(E.F);public class Appstatic void M(A a)Inter1 i=(Inter1)a;i.F();static void Main()A a1=new E();B b1=new E();C c1=new E();D d1=new E();E e1=new E();a1.F();b1.F();c1.F();d1.F();e1.F();A a2=new A();A b2=new B();A c2=new C();A d2=new D();A e2=new E();M(a2);M(b2);M(c2);M(d2);M(e2);2閱讀以下程序，試分別描述程序執(zhí)行至，處時(shí)，變量s1,s2,c1,c2,c3在堆棧和托管堆中的情況，并說(shuō)明原因。(10分)using System;public delegate void D1(PointStruct mystruct);public delegate void D2(PointClass myclass);public delegate void D3(ref PointStruct mystruct);public struct PointStructpublic int x;public int y;public PointStruct(int x,int y)this.x=x;this.y=y;public class PointClasspublic int x;public int y;public PointClass(int x,int y)this.x = x;this.y = y;class myclasspublic static void SetClass(PointClass p)if (p.x=0)p.x = 100;if (p.x=100)p.y += 100;public static void SetStruct(PointStruct p)if (p.x=0)p.x = 100;if (p.x=100)p.y += 100;public static void SetStruct(ref PointStruct p)if (p.x=0)p.x = 100;if (p.x=100)p.y += 100;static void Main()PointStruct s1 = new PointStruct(0,0);PointClass c1 = new PointClass(0,0);PointStruct s2=s1;PointClass c2=c1;PointClass c3 = new PointClass(100,100);/-SetClass(c1);SetStruct(s1);SetStruct(ref s2);/-D1 d1 = new D1(SetStruct);D2 d2 = new D2(SetClass);D3 d3 = new D3(SetStruct);d1 += d1;d2 += d2;d3 += d3;d1(s2);d2(c2);d2(c3);d3(ref s1);/-Console.WriteLine(the end);C#應(yīng)用開發(fā)寫出運(yùn)行結(jié)果1. using System;class MyTestpublic void swap(ref int x, ref int y) int temp=x;x=y;y=temp;class test static void Main()int a=6, b=8;MyTest app=new MyTest();app.swap(ref a,ref b);Console.WriteLine(“a=0 b=1”, a,b); 2using System;class Test static void Main() for(int i=0;i10;i+) Console.Write(i+ “ ” ); if (i%2!=0）Console.WriteLine(); 1using System;class Test public void F(string s) for (int i=0;i0)return a-;else return 0;class Test static void Main( ) Demo x=new Demo(9 );int k=x.M( );while (k0) Console.Write(“0t ”, k*k); j=x.M( ); 1using System;class StringDe public void f(string s) for (int j=0;js.Length;j+=2) Console.Write(sj);return; public static void Main( ) string str1=“ABCDEFGH” ;StringDe ob=new StringDe( ); ob.f(str1); 3using System; class CounterDown int val; public CounterDown(int n) val=n;public int count( ) if (val0) Console.Write(i*3+ “ ” ); i=cd1.count( ); 1 using System;class Demo2 static void Main( ) int k=1, m; while(k=10) m=k*k;Console.Write(0t , m); k+; 2using System;class ARRAY public static void Main( ) int oddsum=0; int evensum=0; int arr=1,5,2,3,6,7,12,15;foreach (int k in arr) if (k%2= =0)evensum+=k; else oddsum+=k; Console.WriteLine(“evensum=0”,evensum);Console.WriteLine(“oddsum=0”,oddsum); static void Main( ) ARRAY a=new ARRAY();a.Fun(); 1using System; class exception static void Main() for(int i=0;i0) return x-; else return 0; class Test static void Main( ) A a=new A(9 ); int j=a.F( ); while (j0) Console.Write(“0t ”, j*j );j=a.F( ); 1using System; class Test static void Main( ) int i,j,k; for(i=1;i=4;i+) for(j=1;j=4-i;j+)Console.Write( );for(k=1;k=2*i-1;k+)Console.Write(*);Console.WriteLine(); 2using System;class CounterDown int val;public CounterDown(int n) val=n; public int count( ) if (val0) Console.Write(i+ “ ” );i=cd1.count( ); 1using System; class StringDe public void f(string s) for (int j=0;js.Length;j+=2)Console.Write(sj);return; public static void Main( ) string str1=“中華人民共和國(guó)于一九四九年建立” ; StringDe ob=new StringDe( );ob.f(str1); 2using System;delegate void MyEventHandler();class MyEvent public event MyEventHandler activate; public void fire() if(activate!=null) activate(); class X int id;public X(int x) id=x/2;public void Xhandler( ) Console.WriteLine( id ); class EventDemo static void Main() MyEvent evt=new MyEvent(); X x1=new X(8); X x2=new X(16);X x3=new X(0);evt.activate+=new MyEventHandler(x1.Xhandler);evt.activate+=new MyEventHandler(x2.Xhandler);evt.activate+=new MyEventHandler(x3.Xhandler); evt.fire(); 1using System; class exception static void Main() for(int i=0;i0) return x-; else return 0; class Test static void Main( ) A a=new A(9 ); int j=a.F( ); while (j0) Console.Write(“0t ”, j*j );j=a.F( ); 1using System; class StringDe public void f(string s) for (int j=0;js.Length;j+=2)Console.Write(sj);return; public static void Main( ) string str1=“中華人民共和國(guó)于一九四九年建立” ; StringDe ob=new StringDe( );ob.f(str1); 2using System;delegate void MyEventHandler();class MyEvent public event MyEventHandler activate; public void fire() if(activate!=null) activate(); class X int id;public X(int x) id=x/2;public void Xhandler( ) Console.WriteLine( id ); class EventDemo static void Main() MyEvent evt=new MyEvent(); X x1=new X(8); X x2=new X(16);X x3=new X(0);evt.activate+=new MyEventHandler(x1.Xhandler);evt.activate+=new MyEventHandler(x2.Xhandler);evt.activate+=new MyEventHandler(x3.Xhandler); evt.fire(); 1 using System; class