●プログラム・リスト●

#import <Foundation/Foundation.h>

NSString* input();

int main (int argc, const char * argv[])
{
    @autoreleasepool {
        NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
        NSDictionary* memodata = [defaults dictionaryForKey:@"memo"];
        NSMutableDictionary* memo = [NSMutableDictionary dictionaryWithDictionary:memodata];
        BOOL flg = YES;
        while (flg) {
            printf("[a]dd or [f]ind: ");
            NSString* cmd = input();
            if ([cmd isEqualToString:@""]) {
                flg = NO;
            }
            if ([cmd isEqualToString:@"a"]) {
                printf("key:");
                NSString* key = input();
                printf("memo:");
                NSString* memostr = input();
                [memo setValue:memostr forKey:key];
                printf("saved...\n");
            }
            if ([cmd isEqualToString:@"f"]) {
                printf("find: ");
                NSString* fstr = input();
                NSString* memostr = [memo valueForKey:fstr];
                printf("%s\n",[memostr cStringUsingEncoding:NSUTF8StringEncoding]);
            }
        }
        [defaults setObject:memo forKey:@"memo"];
        [defaults synchronize];
        printf("bye...");
    }
    return 0;
}

// テキストの入力用関数
NSString* input()
{
    char str[255];
    fgets(str, 255, stdin);
    NSString* result = [NSString stringWithUTF8String:str];
    return [result stringByTrimmingCharactersInSet:
            [NSCharacterSet whitespaceAndNewlineCharacterSet]];
}