已知程序的结果为1 2 3,请填空。
include<iostream.h>
template<class T>
class A
{
public:
T X, y, z;
void display( ) {cout < < x < < " " < < y < < " " < < z;}
};
void main( )
{
A<int>a1;
_____
_____
_____
a1.display( ) ;
}
第1题:
以下程序的运行结果是______。
include<iostream.h>
include<math.h>
template<class T>
class TAdd//定义类模板TAdd,T为类型
{
Tx,y;
public:
TAdd (Ta,Tb) {x=a,y=b;) //构造函数
Tadd() { retum x+y;}//成员函数
};
void main( )
{
TAdd<int>A (5,6);
第2题:
以下程序的执行结果是( )。 #include<iostream.h> template<class T> class Sample { T n; Public: Sample (T i){n=i;) void operator ++(); void disp() {cout<<"n="<<n<<endl;} }; template<class T> void Sample<T>:: opetat
A.n=a
B.a=O
C.n=b
D.a=b
第3题:
下列的模板说明中,正确的是()
A.template <typename T1, typename T2>
B.template <class T1, T2>
C.template < T1 class, T2 class >
D.template <typename T1; typename T2>
第4题:
以下程序的执行结果是______。
include<iostream.h>
class base
{
public:
virtual void who(){cout<<"base class"<<endl:}
};
class derrvel:public base
{
public:
void who(){cout<<"derivel class"<<endl:}
};
class derive2;public base
{
public:
void who() {cout<<"derive2 class"<<endl;}
};
void main()
{
base obj1,*P;
derive1 obj2;
derive2 obj3:
p=&obj1;
p->who();
p=&obj2:
p->who();
p=&obj3;
p->who();
}
第5题:
阅读下面程序:
include <iostream.h>
template <class T>
class TAdd
{
private:
T x, y;
public:
TAdd(T a, T b)
{
x=a;
y=b;
}
T add()
{
return x +y;
}
};
void main( )
{
TAdd<int>a(5,6);
TAdd<double>b(2.4,5.8);
cout<<"s1 ="<<A. add()<<",";
cout<<"s2="<<B, add()<<end1;
}
写出该程序的运行结果:【 】。