我花了很长时间让这段代码正确地摆脱出来。我目前停留在文本的最后一行。我是一起编写代码的新手。我学到的一切都可以在网上和通过这个网站找到。请参阅下面带下划线的注释。请帮忙,让我看看我的计算是否有效......
//.h
@interface ViewController : UIViewController
@property (weak, nonatomic) IBOutlet UITextField *Price87;
@property (weak, nonatomic) IBOutlet UITextField *MPG87;
@property (weak, nonatomic) IBOutlet UITextField *PriceE85;
@property (weak, nonatomic) IBOutlet UITextField *MPGE85;
@property (weak, nonatomic) IBOutlet UITextField *GasTankSize;
- (IBAction)Settings:(id)sender;
- (IBAction)pergallon:(id)sender;
- (IBAction)pertank:(id)sender;
@end
//.m
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController <----------- Getting a Incomplete Implementation here...
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)Settings:(id)sender {
Settings *settings = [[Settings alloc] initWithNibName:nil bundle:nil];
[self presentViewController:settings animated:YES completion:NULL];
}
- (IBAction)addNums:(id)sender {
int a = ([_Price87.text floatValue]);
int b = ([_MPG87.text floatValue]);
int c = ([_PriceE85.text floatValue]);
int d = ([_MPGE85.text floatValue]);
int e = ([_GasTankSize.text floatValue]);
int ans = ((a*e)-((e+(a*e)-(c*e)/b)*d)/e);
[ans setText:[NSString stringWithFormat:@"%i", pergallon]]; <--------- This is the line giving me trouble. I'm getting a "use of undeclaired identifier 'pergallon'
}
@end