Sample Objective-C File

// Sample Objective-C program — samplefiles.com
#import <Foundation/Foundation.h>

@interface Customer : NSObject
@property (nonatomic) NSInteger identifier;
@property (nonatomic, copy) NSString *name;
@property (nonatomic) double balance;
- (BOOL)isVip;
@end

@implementation Customer
- (BOOL)isVip { return self.balance >= 10000; }
@end

int main(int argc, const char *argv[]) {
    @autoreleasepool {
        NSArray *data = @[@[@"Ada", @12500.0], @[@"Grace", @830.5], @[@"Linus", @10000.0]];
        double total = 0;
        for (NSArray *row in data) {
            Customer *c = [Customer new];
            c.name = row[0];
            c.balance = [row[1] doubleValue];
            NSLog(@"%-6@ %10.2f %@", c.name, c.balance, c.isVip ? @"VIP" : @"");
            total += c.balance;
        }