C++ 函数模板和模板类

#include 

#include 

using namespace std;

//函数模板

template<typename T>

bool equivalent(const T&a, const T&b)

{

    return !(a !(b 
  
}
 
  
 
  
//类模板
 
  
template<typename T=int>//默认参数
 
  
class Bignumber{
 
  
  typedef T value_type;
 
  
 
  
  public:
 
  
    Bignumber(value_type a):
 
  
        m_v(a)
 
  
        {
 
  
 
  
        }
 
  
 
  
    inline bool operator <(const Bignumber &obj)const
 
  
    {
 
  
        return m_v< obj.m_v;
 
  
    }
 
  
 
  
  private:
 
  
    value_type m_v;
 
  
};
 
  
 
  
 
  
int main(int argc, char *argv[])
 
  
{
 
  
    QCoreApplication a(argc, argv);
 
  
 
  
    Bignumber<> x(1), b(1);
 
  
 
  
    bool ret = equivalent(x,b);//函数模板自动推导
 
  
 
  
    cout< 
  
 
  
    cout<double>(5,1);//函数模板特化
 
  
    while (1) {
 
  
 
  
    }
 
  
 
  
    return a.exec();
 
  
}