Objective-C(Chapter 3 of Cocoa Programming for Mac OS X)

youngfan007

1 #import <Foundation/Foundation.h>
2
3
4 @interface LotteryEntry : NSObject {
5     NSCalendarDate *entryDate;
6     int firstNumber;
7     int secondNumber;
8 }
9
10 - (void)prepareRandomNumbers;
11 - (void)setEntryDate:(NSCalendarDate *)date;
12 - (NSCalendarDate *)entryDate;
13 - (int)firstNumber;
14 - (int)secondNumber;
15
16 @end　　


1 #import "LotteryEntry.h"
2
3
4 @implementation LotteryEntry
5
6 - (void)prepareRandomNumbers
7 {
8     firstNumber = random() % 100 + 1;
9     secondNumber = random() % 100 + 1;
10 }
11
12 - (void)setEntryDate:(NSCalendarDate *)date
13 {
14     entryDate = date;
15 }
16
17 - (NSCalendarDate *)entryDate
18 {
19     return entryDate;
20 }
21
22 - (int)firstNumber
23 {
24     return firstNumber;
25 }
26
27 - (int)secondNumber
28 {
29     return secondNumber;
30 }
31
32 - (NSString *)description
33 {
34     NSString *result = [[NSString alloc] initWithFormat:@"%@ = %d and %d", [entryDate descriptionWithCalendarFormat:@"%b %d %Y"], firstNumber, secondNumber];
35     return result;
36 }
37 @end　　
　　


1 #include <Foundation/Foundation.h>
2 #include "LotteryEntry.h"
3
4 int main (int argc, const char * argv[]) {
5     // insert code here...
6     
7     NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
8     
9     NSCalendarDate *now = [[NSCalendarDate alloc] init];
10     srand(time(NULL));
11     
12     
13     NSMutableArray *array;
14     array = [[NSMutableArray alloc] init];
15     
16     int i;
17     for (i=0; i<10; i++)
18     {
19         NSCalendarDate *iWeeksFromNow;
20         iWeeksFromNow = [now dateByAddingYears:0 months:0 days:(i*7) hours:0 minutes:0 seconds:0];
21         LotteryEntry *entry = [[LotteryEntry alloc] init];
22         [entry prepareRandomNumbers];
23         [entry setEntryDate:iWeeksFromNow];
24         
25         [array    addObject:entry];
26     }
27         
28     for(LotteryEntry *entryToPrint in array)
29     {
30         NSLog(@"%@", entryToPrint);
31     }
32     
33     [pool drain];
34     
35     return 0;
36 }