Re: [Dev-C++] Parametric polymorfizm

[Jason H. <jas...@bt...>]

Hi Vatay.

You forgot the typedefs in the header:

typedef counter<int> int_counter;
typedef counter<float> float_counter;

Hope this helps. The code you were using was actualy creating instances of
objects in the header, which is very bad.

Toodle-pip, Jason. ;)


----- Original Message -----
From: "Vatay" <va...@op...>
To: <dev...@li...>
Sent: Tuesday, October 23, 2001 1:31 PM
Subject: [Dev-C++] Parametric polymorfizm


Hi,

I have one litle problem, to this time only C projects written and slowly
become familiar with polimorfizm and here is my problem:
I can't asking my friends (all programmed in Delphi).
A have one litte example written and the compiler returned  7 errors!

what have I wrong written?


Thank,

      Szeg,ny Leg,ny

Error message:
c:/devcpp/paramtr/main.cpp: In function `int main()':
c:/devcpp/paramtr/main.cpp:11: `int_count' undeclared (first use this
function)
c:/devcpp/paramtr/main.cpp:11: (Each undeclared identifier is reported only
once
c:/devcpp/paramtr/main.cpp:11: for each function it appears in.)
c:/devcpp/paramtr/main.cpp:11: parse error before `;'
c:/devcpp/paramtr/main.cpp:12: `float_counter' undeclared (first use this
function)
c:/devcpp/paramtr/main.cpp:14: `c1' undeclared (first use this function)
c:/devcpp/paramtr/main.cpp:15: `c2' undeclared (first use this function)



Sorce code's:

// FILE: main.cpp
//
// SNIP: parametrikus polimorfizmus


#include <stdio.h>
#include "count.h"

main()
      {
         int_count c1;
         float_counter c2;

         c1.put_value(5);
         c2.put_value(5.5);

         printf("\n c1 = %d", c1.access_value() );
         printf("\n c2 = %f", c2.access_value() );
      }


// FILE: count.h

template <class T> class counter
{
    private:
            T value;
    public:
            counter () { value = 0; }

            void increment() { value++; }

            void decrement() { if(value > 0) value--; }

            T access_value() { return value; }

            void put_value( T new_value) { value = new_value; }

};

typedef counter<int> int_counter;
typedef counter<float> float_counter;

----------------- Live long OPREA & the Net

This e-mail has been sent with OperaMail,  as a  free  service  from
Opera  Software.


_______________________________________________
Dev-cpp-users mailing list
Dev...@li...
https://lists.sourceforge.net/lists/listinfo/dev-cpp-users