下面程序的输出为( )。 public class Test { public static void main (String args[]) { int x,y; x=1; y=2; System.out.println("The output is"+x+y); } }A.The output is xyB.The output is 3C.The output is 12D.The output is x=1 y=2
下面程序的输出为( )。 public class Test { public static void main (String args[]) { int x,y; x=1; y=2; System.out.println("The output is"+x+y); } }
A.The output is xy
B.The output is 3
C.The output is 12
D.The output is x=1 y=2
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将下面程序补充完整。 include using namespace std; class Base{ public: 【 】fun(){r 将下面程序补充完整。include <iostream>using namespace std;class Base{public:【 】 fun(){return 0;} //声明虚函数};class Derived:public Base{public:x,y;void SetVal(int a,int b){}int fun(){return x+y;}};void 【 】 SetVal(int a,int b){x=a;y=b;} //类Derived成员函数void main(){Derived d;cout<<d.fun()<<endl;}
有如下程序: #includeiostream usingnamespacestd; classTest( public: Test( ){} Test(constTest8Lt){cout1;} }; Testfun(Test&u){Testt=U;returnt;} intmain( ){Testx,y;x=fun(y);return0;} 运行这个程序的输出结果是( )。A.无输出B.1C.1lD.111
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以下标识符哪些是合法的?哪些是Java的关键字? miles, Test, a++, --a, 4#R, $4, #44, apps,class, public, int, x, y, min value, 成绩, radius,最大值max。