Create a small guessing number game using Objective-C

GuessNumberGame.h

#import <Foundation/Foundation.h>

@interface GuessNumberGame : NSObject

- (void)startGame; // 开始游戏

@end

GuessNumberGame.m

#import "GuessNumberGame.h"

@implementation GuessNumberGame
{
    NSInteger _targetNumber; // 目标数字
}

- (instancetype)init
{
    self = [super init];
    if (self) {
        // 在1到100之间生成一个随机数作为目标数字
        _targetNumber = arc4random_uniform(100) + 1;
    }
    return self;
}

- (void)startGame
{
    NSInteger guessCount = 0;
    NSInteger guessNumber;
    
    NSLog(@"猜数字游戏开始！");
    
    do {
        NSLog(@"请输入一个1到100之间的整数：");
        scanf("%ld", &guessNumber);
        
        guessCount++;
        
        if (guessNumber > _targetNumber) {
            NSLog(@"猜大了！");
        } else if (guessNumber < _targetNumber) {
            NSLog(@"猜小了！");
        } else {
            NSLog(@"恭喜你，猜对了！");
            break;
        }
    } while (1);
    
    NSLog(@"你一共猜了%ld次。", guessCount);
}

@end

main.m

#import <Foundation/Foundation.h>
#import "GuessNumberGame.h"

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        GuessNumberGame *game = [[GuessNumberGame alloc] init];
        [game startGame];
    }
    return 0;
}