Template Arguments

Template Arguments

Templates can have multiple arguments. These arguments are normally denoted by the data type T. But along with T we can also define other data type arguments. For example we can define the template function as

Compare (T first, int second); //First argument is of type T and second is int

Following program illustrates this concept ‒

#include <iostream>

using namespace std;

template <class T>

class Compare

{ //writing the class as usual

       Ta, b;//note we have used data type as T

     public:

       Compare (T first, int second);

              T max ();//finds the maximum element among two

};

//template class member function definition

 //here the member function is constructor

template<class T>

Compare<T>::Compare(T first, int second)

{

       a=first;

       b=second;

}

//here the member function of template class is max

template<class T>

T Compare <T>::max ()

{

T val;

 if(a>b)

       val=a;

else

       val=b;

return val;

}

int main()

{

       Compare <int> obj1 (100, 160);//comparing two integers

       cout<<"\n maximum(100,160) = "<<obj1.max();

       return 0;

}

Review Question

1. Explain the concept of templates arguments using C++.