CODEWITHSUNDEEP
c++classtemplates
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Reputation: 81

how to declare member function using template? (not template class)

I want to declare a template member function in the class. As i know, we can declare that below case1. But it will make several classes, but i want to make only one class. I will not use the template to set member variable. I will use that only for parameter of member function. I want to make template function which can handle vary types in one class instance. So, is there any way to make template function in the one class? 

//case1, standard template function
#include <iostream>
using namespace std;

template <typename T>
class A{
     public:
       void f(T n){
         cout << n <<endl;
       }
};

int main(){
    A<int> a1;
    a1.f(1);
    A<float> a2;
    a2.f(0.1);
}

//case2, i want to make member function which can receive vary type.
#include <iostream>
using namespace std;

class A{
      public:
        template <typename T>
        void f(T n){
           cout << n <<endl;
        }
}

int main(){
   A a();
   a.f(1);
   a.f(0.1);
}

Upvotes: 1

Views: 380

Answers (1)

Buddy
Buddy

Reputation: 11028

Your code works for me after fixing a couple minor typos:

#include <iostream>
using namespace std;

class A{
      public:
        template <typename T>
        void f(T n){
           cout << n <<endl;
        }
};

int main(){
   A a;
   a.f(1);
   a.f(0.1);
}

$ g++ main.cc

./a.out

1

0.1

Upvotes: 2

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