Thread: Problem with defining function

Originally Posted by curious

ok the basic structure is :

Code:

#define ......

int main()
{
}

bool func() /**bool is taken care of and works fine**/
{

   defined function is called here as explained above
}

You need to add a function prototype for bool func() before you call it from main, if that's what you're doing. Like this:

Code:

#define ......

/*function prototype*/
bool func();

int main()
{
}

bool func() /**bool is taken care of and works fine**/
{

   defined function is called here as explained above
}

EDIT:

Say you have the code

Code:

int main()
{
    a();
}

void a()
{
    /* do something */
}

Now, the compiler is going to go along like this

Ok here's the main function, I'll just dive into it and start compiling the code in there. Hmm, "a();", I've never seen "a" before, what's it supposed to be? Wait, you're calling it? Does that mean it's a function? Could it be a typo? For that matter, it's not even supposed to exist! I guess I'll just have to throw an error as I'm not smart enough to look ahead.

Hope that clears the function prototype issue up if that is a problem, I'm not sure exactly what the problem is.

Originally Posted by curious

ok here's what i have done;

#define a(r) ((4)*(1/r)*(1-(1/r)));

using it like this:

tot = tot + a(r);

But while compiling i get :

invalid operands to binary +

Can anyone suggest me what am i doing wrong?

What are you returning from the func() function? I guess the problem is with bool type returning.