CS 193P Calculator App

[atesfai]

this seemed to work for me:

- (IBAction)plusMinusPressed { if ([self.display.text hasPrefix:@"-"]){ self.display.text = [self.display.text substringFromIndex:1]; } else {

 self.display.text = [NSString stringWithFormat:@"-%@", self.display.text]; }

}

[S7347TH7]

@DeathRageUltra

Any chance you can tell me how to do the +/- part? or show me the code for it please?

[eltrading]

@palmloyal

@property(nonatomic) BOOL userHasEnteredADecimalPoint;

[palmloyal]

I am doing the 2011 course,but cannot figure out how to prevent additional decimals from being entered. Can you please help?

[kgera95]

Wow...and i can barely finish a "Hello World" program!

[00melo00]

Ah I finally got it finished as well :)

[00melo00]

Awesome! How did you do it? I can't really grasp the objective C language yet... :-/ I only got the first part of the assignment :P