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Full Discussion: Error: undefined reference to winmain@16?
Top Forums Programming Error: undefined reference to winmain@16? Post 302876613 by Corona688 on Monday 25th of November 2013 03:46:24 PM
Old 11-25-2013
Again, the compiler is not asking you to jam random things into the middle of your code when it says main doesn't exist. It's asking you to add main(), unrelated to your code, outside it.

Of course, if you want your function to be run, you should tell main() to run it, since main runs everything.

Code:
#include <iostream>

using namespace std;

// Your function
int identity(int input)
{
  int output = input;
  return output;
}

// The function which the compiler will call when the program is run
int main() {
        int output=identify(32);
}

This User Gave Thanks to Corona688 For This Post:
DyslexicChciken
 

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LEARN ABOUT MOJAVE

tk_main

Tk_Main(3)						       Tk Library Procedures							Tk_Main(3)

__________________________________________________________________________________________________________________________________________________

NAME

       Tk_Main - main program for Tk-based applications

SYNOPSIS

       #include <tk.h>

       Tk_Main(argc, argv, appInitProc)

ARGUMENTS

       int argc (in)				  Number of elements in argv.

       char *argv[] (in)			  Array of strings containing command-line arguments.

       Tcl_AppInitProc *appInitProc (in)	  Address  of  an  application-specific  initialization procedure.  The value for this argument is
						  usually Tcl_AppInit.
_________________________________________________________________

DESCRIPTION

       Tk_Main acts as the main program for most Tk-based applications.  Starting with Tk 4.0 it is not called main anymore because it is part	of
       the Tk library and having a function main in a library (particularly a shared library) causes problems on many systems.	Having main in the
       Tk library would also make it hard to use Tk in C++ programs, since C++ programs must have special C++ main functions.

       Normally each application contains a small main function that does nothing but invoke Tk_Main.  Tk_Main then does all the work of  creating
       and running a wish-like application.

       When  it  is  has  finished  its own initialization, but before it processes commands, Tk_Main calls the procedure given by the appInitProc
       argument.  This procedure provides a "hook" for the application to perform its own initialization, such	as  defining  application-specific
       commands.  The procedure must have an interface that matches the type Tcl_AppInitProc:
	      typedef int Tcl_AppInitProc(Tcl_Interp *interp);
       AppInitProc is almost always a pointer to Tcl_AppInit; for more details on this procedure, see the documentation for Tcl_AppInit.

KEYWORDS

       application-specific initialization, command-line arguments, main program

Tk									4.0								Tk_Main(3)
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