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Language Objective C
(No Memory Leak)
| Date: | 04/11/09 |
| Author: | Joshua Pennington |
| URL: | n/a |
| Comments: | 1 |
| Info: | n/a |
| Score: |  (3.00 in 11 votes) |
#import <Foundation/Foundation.h>
#define kWallDefaultBottles 99
@interface Wall : NSObject {
NSUInteger _bottles;
}
- (id)initWithBottles:(NSUInteger)numBottles; // designated initializer
- (void)drinkingCascade;
- (NSUInteger)bottles;
@end
@interface Wall (Private)
- (void)setBottles:(NSUInteger)newBottles;
- (void)drinkOne;
@end
@implementation Wall
- (id)initWithBottles:(NSUInteger)numBottles {
if (self = [super init]) {
_bottles = numBottles;
}
return self;
}
- (NSUInteger)bottles { return _bottles; }
- (void)drinkingCascade {
while ([self bottles] > 0)
[self drinkOne];
}
@end
@implementation Wall (Private)
- (void)setBottles:(NSUInteger)newBottles { // To be KVC compliant
_bottles = newBottles;
}
- (void)drinkOne {
NSUInteger bottles = [self bottles];
if (bottles > 1) {
printf("%lu bottles of beer on the wall, %lu bottles of beer,\n", bottles, bottles);
printf("Take one down, pass it around,\n");
printf("%lu bottles of beer on the wall.\n\n", bottles-1);
}
else {
printf("1 bottle of beer on the wall, 1 bottle of beer,\n");
printf("Take one down, pass it around,\n");
printf("No bottles of beer on the wall.\n\n");
}
[self setBottles:bottles - 1];
}
@end
int main (int argc, const char *argv[]) {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
Wall *wall = [[Wall alloc] initWithBottles:kWallDefaultBottles];
[wall drinkingCascade];
[wall release];
[pool drain];
return 0;
}
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