本地声明“”隐藏实例和不完整的实现

@implementation ViewController

-(IBAction)ReturnKeyButton:(id)sender {
  [sender resignFirstResponder];
}

@synthesize torque, horsepower, rpm, rpmf2;

-(IBAction)Operation1:(id)sender {
  float result = 2 * 3.14 *([torque.text floatValue] * [rpm.text floatValue]) / 33000;

  answer1.text = [[NSString alloc] initWithFormat:@"%2.f", result];
}

-(IBAction)Operation2:(id)sender {
  float result = 2 * 3.14 * ([horsepower.text floatValue] * [rpmf2.text floatValue]) /     33000;

  answer2.text = [[NSString alloc] initWithFormat:@"%2.f", result];
}
@implementation ViewController

-(IBAction)Retu