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objective-calgorithm

How to check the greater value in Objective-C?

I am creating a graph. I get 5 values at run time so how should I know which is greater so that I may set max limit?

I have following 5 varibale of values;

int value3=(int)roundf(appDelegate.itemOneValue);
int value4=(int)roundf(appDelegate.itemTwoValue);

int value5=(int)roundf(appDelegate.itemThreeValue);

int value6=(int)roundf(appDelegate.itemFourValue);

int value7=(int)roundf(appDelegate.itemFiveValue);

How to check which of the above variables has the larger value?

Solution 
  • NSArray *allValues = @[[NSNumber numberWithInt:(int)roundf(appDelegate.itemOneValue)], 
    [NSNumber numberWithInt:(int)roundf(appDelegate.itemTwoValue)], 
    [NSNumber numberWithInt:(int)roundf(appDelegate.itemThreeValue)], 
    [NSNumber numberWithInt:(int)roundf(appDelegate.itemFourValue)],
    [NSNumber numberWithInt:(int)roundf(appDelegate.itemFiveValue)]];

int max = [[allValues valueForKeyPath:@"@max.intValue"] intValue];

    or

    NSNumber * max = [allValues valueForKeyPath:@"@max.intValue"];

    An alternative that is less flexible but may be easier to understand: 

    int max = (value2 < value1) value2 : value1;
max = (value3 < max) value3 : max;
max = (value4 < max) value4 : max;
max = (value5 < max) value5 : max;
max = (value6 < max) value6 : max;
max = (value7 < max) value7 : max; 
// now max contains the highest of all values.