c++模板类 各种函数在类外实现
#include <iostream>
using namespace std;
/*模板类 各种函数在类外的实现*/
template <typename T>
class AA
{
public:
AA(T a, T b);
void printAA();
AA operator+(AA &tmp);
//友元函数重载<<
friend ostream& operator<< <T>(ostream& out, AA<T>& tmp);
private:
T a;
T b;
};
template <typename T>
AA<T>::AA(T a, T b)
{
this->a = a;
this->b = b;
}
template <typename T>
void AA<T>::printAA()
{
cout << "a:" << a << " b:" << b << endl;
}
//类外实现函数时，加T的地方有 函数返回值，类名:: ，形参变量
template <typename T>
AA<T> AA<T>::operator+(AA<T> &tmp)
{
AA tt(this->a + , this->b + );
return tt;
}
//友元函数重载<<
template <typename T>
ostream& operator<< (ostream& out, AA<T>& tmp)
{
out << "a=" << << " b=" << << endl;
return out;
}
int main()
{
AA<int> tmp(5, 6);
AA<int> tmp1(5, 7);
AA<int> tmp2 = tmp1 + tmp;
();
cout << tmp2 << endl;
return 0;
}