Template Default Arguements

[Vikram Narayan]

// How to pass default arguments to function templates. ?

#include <iostream>
using namespace std;

// template<typename A=int,typename B>
//Code Produces error if above line is uncommented

template<typename A,typename B>
void function(A,B);

int main()
{
function(5,3.2);
return 0;
}


template<typename A,typename B>
void function(A a,B b)
{
cout <<"Sum: " << a+b << endl;
}

[zb0S216C]

Default template arguments are only allowed on class definitions. Also, template arguments (typename) must be on the right-hand side. For example:

template < typename T = int, typename P > // Wrong!
class CLASS
{
};

template < typename P, typename T = int > // Correct!
class CLASS
{
};

I does help the specify your compiler since some compilers have their own rules about default template arguments.

_Wazzak

[Vikram Narayan]

Hi Framework,
Thanks for answering this question.
This is the compiler which I use.
gcc version 4.4.3
Best,
Vikram

[zb0S216C]

I can't seem to find the manual for your compiler. Sorry. However, you could try what I previously posted and see if that fixes your problem.

_Wazzak

[Vikram Narayan]

Thanks, your fix works for me.