Linker error

[jenco]

Hi,

Is there someone out there who can help. I've written some simple functions, on the same page as the main code:

bool IsAVowel (char ch)
{
      if(ch=='a')|| (ch=='e') || (ch=='i') || (ch=='o') || (ch==''u)
      {
      return true;
      }
      return false;
}

The compiler message gives 'linker error'
Why won't the main program use these. Sorry if this is a bit basic, but could really use some help with this.

jenco

[Narue]

Split into a new thread. Please don't post unrelated questions into existing threads.

[iamthwee]

What's the error msg?

[Zay]

Hi,

Is there someone out there who can help. I've written some simple functions, on the same page as the main code:

bool IsAVowel (char ch)
{
      if(ch=='a')|| (ch=='e') || (ch=='i') || (ch=='o') || (ch==''u)
      {
      return true;
      }
      return false;
}

The compiler message gives 'linker error'
Why won't the main program use these. Sorry if this is a bit basic, but could really use some help with this.

jenco

i am not sure ,
but why can not the if statement be like this :

if(ch=='a'|| ch=='e' || ch=='i' || ch=='o' || ch==''u)

try to run it and see.

[Nick Evan]

Did you define the function like this: bool IsAVowel (char) before calling main? Not doing this will result in a linker error (something like: could not find function definition). Your program should look something like this:

#include <blabla>
 
bool IsAVowel (char);
 
int main(void)
{
-code-
}
 
 bool IsAVowel (char ch)
{      
if (ch=='a')|| (ch=='e') || (ch=='i') || (ch=='o') || (ch==''u)      
{
      return true;  
 
}     
 return false;
}

Niek

[anw]

I think you either didn't post the real code, or your compiler is giving bogus error messages. Before going any further, I would fix the syntax error in this line:

if (ch=='a')|| (ch=='e') || (ch=='i') || (ch=='o') || (ch==''u)

If (ch==''u) compiles at all, it most certainly won't do what you intend.

Regards,
anw