Funky Math

I seem to have all these odd problems that I am struggling to find the answer for, this one seems so basic. I have a Table view that loads when the user clicks a button. I then iterate through the dollar amounts stoered in the mutableArray and add up the amounts for a total, but the math is off?

I think it has something to do with the dequeueReusableCellWithIdentifier since the final 2 that are supposed to be added to the total are skipped. I had a problem many months ago when values when off the screen they returned as 0, but I solved that. But in this instance I an just dealing with the array and the values in it's indexes?

Code:

-(void)addUpTheValues{ // calculates the values in the text fields
    runningGrandTotal = 0.0;
    
    for (int i = 0; i < totalPayments.count; i++) {
        NSString *TempTwoString = [totalPayments objectAtIndex:i];
        runningGrandTotal +=   [TempTwoString floatValue];
        
        NSLog(@"Temp %d : %@", i, TempTwoString);
        NSLog(@"The Running Grand Total is %.2f", runningGrandTotal);
    }
    grandTotal.text = [NSString stringWithFormat:@"%.2f",runningGrandTotal];
   
}

Here is the print out from the NSLog. It adds everything up and then stops at 2300.00 at "Temp 8" and on? Thje values are there but it is not adding them in?

 

OMG! I was looking at that for about 3 hours last night and the answer was right in front of me. Now I feel dumb and thanks for the second set of eyes that caught that. I guess that was a good thing while I am flushing out my code. I should build in make some method that will check to see that only valid characters are in a textField to avoid that.

Chown33- my numbers are stored in an NSMutableArray and from what I understand I can not store primitive data types in that type of array. These arrays are also stored in a Property List, which I also think need to be objects and not primitive data types. I must first wrap them in an object before I can store them. I have gotten use to using NSString as my go to object for this. I don't see a big difference between something like NSString and NSNumber to wrap my int's or floats in?

I understand what you are saying about "Calculate with numbers". so instead of this line of code

Code:

runningGrandTotal +=   [TempTwoString floatValue];

It should be something like

Code:

float someNumber =   [TempTwoString floatValue];
runningGrandTotal += someNumber;

Thanks again for the assist!

 

Hummm.... I will adopt that and read up on the NSNumber class. I am curious why it is more expensive in terms of compute time with NSString then NSNumber? I will read up on it tonight and thanks for pointing that out Jim

 

Wow, some benchmarks. I guess when you are designing complex things and games it is good to use the correct object for the task at hand.

Chown33 - I looked at the doc's and thought that you could only have integers in an NSNumbers but it said this

Char is a character and not an integer value? So I guess NSNumber can hold more the numbers.