Link problem with Lesson 5: Switch case

I have this piece of code, from Lesson 5: Switch case.

When I compile it, I get this from VS 2005:

Code:

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1>------ Build started: Project: test, Configuration: Release Win32 ------
1>Compiling...
1>test.cpp
1>Linking...
1>test.obj : error LNK2001: unresolved external symbol "void __cdecl playmultiplayer(void)" (?playmultiplayer@@YAXXZ)
1>test.obj : error LNK2001: unresolved external symbol "void __cdecl playgame(void)" (?playgame@@YAXXZ)
1>test.obj : error LNK2001: unresolved external symbol "void __cdecl loadgame(void)" (?loadgame@@YAXXZ)
1>test - 4 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

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any suggestions ?

where are those three functions declared? Are they in a library that you failed to include in the project or in another *.cpp file that you didn't add to the project. You have to find out where those functions are and either add the *.cpp or the library. Books often contain code snippets that will not compile and link by themselves.

Quote:

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This program will compile, but cannot be run until the undefined functions are given bodies, but it serves as a model (albeit simple) for processing input.

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To link and run you need to fill in the code for those functions.

Hi Ancient Dragon !

It say's in the text:

Quote:

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Below is a sample program, in which not all of the proper functions are actually declared, but which shows how one would use switch in a program.

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Code:

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#include <iostream>

using namespace std;

void playgame();
void loadgame();
void playmultiplayer();
       
int main()
{
  int input;
 
  cout<<"1. Play game\n";
  cout<<"2. Load game\n";
  cout<<"3. Play multiplayer\n";
  cout<<"4. Exit\n";
  cout<<"Selection: ";
  cin>> input;
  switch ( input ) {
  case 1:            // Note the colon, not a semicolon
    playgame();
    break;
  case 2:            // Note the colon, not a semicolon
    loadgame();
    break;
  case 3:            // Note the colon, not a semicolon
    playmultiplayer();
    break;
  case 4:            // Note the colon, not a semicolon
    cout<<"Thank you for playing!\n";
    break;
  default:            // Note the colon, not a semicolon
    cout<<"Error, bad input, quitting\n";
    break;
  }
  cin.get();
}

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> in which not all of the proper functions are actually declared
This is the key phrase - the program isn't complete.

> void playgame();
For these three functions, you need to provide

Code:

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void playgame() {
  cout << "playgame called\n";
}

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Hi Salem


Yep, that did the trick ;-)

No body, no function !


regards,

The SharK