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Passing NULL as pointer to function gives error

 
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dev39



Joined: 01 Jan 2010
Posts: 3

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Passing NULL as pointer to function gives error
PostPosted: Fri Jan 01, 2010 5:45 am     Reply with quote
Hi,
I am trying to pass NULL for pointer to function, the compiler complains
"Expecting function Name". Is there any way I can pass NULL for pointer to function. Compiler version is 4.081.

Code:

   #include <18F46K20.h>
 #use delay(clock=20000000)
 #use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)
  #include <stdio.h>

typedef int (* _ptr_to_fn_)(int a,int b);

int test(int a , int b){
return (a+b);
}

int operation(int a, int b, _ptr_to_fn_ fn){
   return (*fn)(a,b);
}

void main(){

   operation(1,2,test); //compiles ok
   operation(1,2,NULL); //Error 53: Expecting function name
}
FvM



Joined: 27 Aug 2008
Posts: 2337
Location: Germany

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PostPosted: Fri Jan 01, 2010 6:04 am     Reply with quote
Code:
_ptr_to_fn_ _NULL = 0;

operation(1,2,_NULL);
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