Question

I have a function as follows:

-(int)ladderCalc:(NSArray*)amounts percentages:(NSArray*)percentages amount:(int)amount
{

   // Do some stuff

   return foo;
}

I have declared like this in the header file:

-(int)ladderCalc:(NSArray*)amounts percentages:(NSArray*)percentages amount:(int)amount;

But I am getting an error “implicit declaration of function is invalid in c99” when I try to use the int value returned elsewhere in the same file. Am I not declaring the function correctly?

UPDATE

I am realizing that I am not declaring this in the standardized way, I changed my declaration to MarkGranoff’s recommendation (see the changes above) but I am still getting it as a warning this time.

Here is the context of how I am calling this function:

-(int)fooTotal: (int)amount 
{

   int totalFee = 0;

   // Declare arguments
   NSArray *percentages = [[NSArray alloc] initWithObjects:firstValue, secondValue, thirdValue, fourthValue, fifthValue, nil];
   NSArray *amounts = [[NSArray alloc] initWithObjects:sixthValue, seventhValue, eigthValue, ninthValue, nil];

   totalFee = ladderCalc(amounts,percentages,amount);

   return totalFee;
}

So, I am still getting a warning even though this seems to make sense as far as Obj-C style is concerned.

I am pretty sure I am not calling this function correctly, I am getting an unrecognized symbol error when I compile the project.

Undefined symbols for architecture i386:
  "_ladderCalc", referenced from:
      -[FeeCalcLibrary getMFModelTotal:] in FeeCalcLibrary-A83D2A7637F57664.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

Try this instead:

-(int)ladderCalc:(NSArray*)amounts percentages:(NSArray*)percentages amount:(int)amount;

and change the signature of the implementation to match. Then you have arguments with names you can reference in the code of the method. Namely: amounts, percentages, and amount.