我正在尝试编译这个代码,但是无法确定问题所在。我使用MacOSX Snow Leopard和Xcode g++版本4.2.1。有人能告诉我问题出在哪里吗?我认为这应该可以编译。这不是我的作业,我是一名开发者......至少我认为我是,直到我被这个问题难住了。我收到以下错误消息:
error: no matching function for call to ‘Child::func(std::string&)’
note: candidates are: virtual void Child::func()
这是代码:
#include <string>
using namespace std;
class Parent
{
public:
Parent(){}
virtual ~Parent(){}
void set(string s){this->str = s;}
virtual void func(){cout << "Parent::func(" << this->str << ")" << endl;}
virtual void func(string& s){this->str = s; this->func();}
protected:
string str;
};
class Child : public Parent
{
public:
Child():Parent(){}
virtual ~Child(){}
virtual void func(){cout << "Child::func(" << this->str << ")" << endl;}
};
class GrandChild : public Child
{
public:
GrandChild():Child(){}
virtual ~GrandChild(){}
virtual void func(){cout << "GrandChild::func(" << this->str << ")" << endl;}
};
int main(int argc, char* argv[])
{
string a = "a";
string b = "b";
Child o;
o.set(a);
o.func();
o.func(b);
return 0;
}