Hi guys,

The following code is not being compiled. I am getting this error
message:

C:\Dev-Cpp\tmp2Params.cpp In function `T1 maxx(const T1&, const T2&)
[with T1 = int, T2 = double]':
12 C:\Dev-Cpp\tmp2Params.cpp instantiated from here
7 C:\Dev-Cpp\tmp2Params.cpp [Warning] converting to `int' from
`double'

Any idea, what i am missing here. i am purposly passing the arguments
as int and double i.e. (4,5.5 ).The compiler is Dev C++.

#include <iostream>
using namespace std;

template <class T1, class T2 >
T2 maxx (T1 const& a, T2 const& b)
{
return a > b ? a:b;
}

int main( int argc, char ** argv)
{
cout << " Max: " << maxx(4, 5.5) << endl;

getchar();
}

* param:
> Hi guys,
>
> The following code is not being compiled. I am getting this error
> message:
>
> C:\Dev-Cpp\tmp2Params.cpp In function `T1 maxx(const T1&, const T2&)
> [with T1 = int, T2 = double]':
> 12 C:\Dev-Cpp\tmp2Params.cpp instantiated from here
> 7 C:\Dev-Cpp\tmp2Params.cpp [Warning] converting to `int' from
> `double'

This is not a compilation error, it's a warning.


> Any idea, what i am missing here. i am purposly passing the arguments
> as int and double i.e. (4,5.5 ).The compiler is Dev C++.
>
> #include <iostream>
> using namespace std;
>
> template <class T1, class T2 >
> T2 maxx (T1 const& a, T2 const& b)
> {
> return a > b ? a:b;
> }
>
> int main( int argc, char ** argv)
> {
> cout << " Max: " << maxx(4, 5.5) << endl;
>
> getchar();
> }

This is not the code you compiled.

However, if you swap the actual arguments, or make the result type T1,
you can reproduce the warning, which is due to return expression of type
double being converted to function result type int.


Cheers, & hth.,

- Alf

--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
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param wrote:

> Hi guys,
>
> The following code is not being compiled. I am getting this error
> message:
>
> C:\Dev-Cpp\tmp2Params.cpp In function `T1 maxx(const T1&, const T2&)
> [with T1 = int, T2 = double]':
> 12 C:\Dev-Cpp\tmp2Params.cpp instantiated from here
> 7 C:\Dev-Cpp\tmp2Params.cpp [Warning] converting to `int' from
> `double'

Note that the compiler claims the signature of the function to be:

T1 maxx(const T1&, const T2&)
^^

This does not match your code below.


> Any idea, what i am missing here.

Maybe some include gets an old version of some file.


> i am purposly passing the arguments
> as int and double i.e. (4,5.5 ).The compiler is Dev C++.
>
> #include <iostream>
> using namespace std;
>
> template <class T1, class T2 >
> T2 maxx (T1 const& a, T2 const& b)
> {
> return a > b ? a:b;
> }
>
> int main( int argc, char ** argv)
> {
> cout << " Max: " << maxx(4, 5.5) << endl;
>
> getchar();
> }


Best

Kai-Uwe Bux