c ++模板特化方法定义

Answer 1

Answer 2

将其写为：

#include <string>
#include <iostream>
using namespace std;

template<class T> class foo{
  public:
  string what();
};

template<class T> string foo<T>::what(){
  return "foo of type T";
}

template<> class foo<char>{
public:
  string what();
};

string foo<char>::what(){
  return "foo of type char";
}

int main(){
  foo<char> f;
  cout << f.what() << endl;
}

按预期工作。

Answer 3