书上的一个例子,我编译总是不通过.请帮我分析.

下面是书上得一个例子,
  #include <iostream.h>

class Counter
{
public:
Counter();
Counter(int initialValue);
~Counter(){};
int  GetItsVal() const {return itsVal;};
void SetItsVal(int x)  {itsVal = x;};
Counter Add(const Counter &);

private:
int itsVal;
}

Counter::Counter(int initialValue):itsVal(initialValue){}

Counter::Counter():itsVal(0){}

Counter  Counter::Add(const Counter & rhs)
{
return Counter(itsVal + rhs.GetItsVal());
}

int main()
{
Counter varOne(2), varTwo(4), varThree;
varThree = varOne.Add(varTwo);
cout<<"varOne: "<<varOne.GetItsVal()<<endl;
cout<<"varTwo: "<<varTwo.GetItsVal()<<endl;
cout<<"varThree: "<<varThree.GetItsVal()<<endl;

return 0;
}
我编译不能通过,出现如下错误信息:
D:\C++\Add\Add.cpp(17) : error C2533: 'Counter::Counter' : constructors not allowed a return type
D:\C++\Add\Add.cpp(23) : error C2264: 'Counter::Counter' : error in function definition or declaration; function not called
D:\C++\Add\Add.cpp(23) : error C2264: 'Counter::Counter' : error in function definition or declaration; function not called
D:\C++\Add\Add.cpp(28) : error C2264: 'Counter::Counter' : error in function definition or declaration; function not called
D:\C++\Add\Add.cpp(28) : error C2264: 'Counter::Counter' : error in function definition or declaration; function not called
Error executing cl.exe.
  请高手帮我分析这段程序的问题.谢谢!

让大家见笑了.这个错误很幼稚.函数声明的{}后可以不用分号,类的声明{}后必须用分号.改正后就没事了.

偶尔语法错误，谁都会犯的

尽管问题已经解决,但我还是那些关心我的陌生朋友.

糟了,我本打算放分,突然发现已经不能.不好意思.下次吧.