今天用所学的java知识尝试敲了一个猜数字游戏的简单代码，源代码如下：

public static void main(String[] args) {
guessNumberGame();
}
public static void guessNumberGame() {
while(true){
int choice = menu();
if(choice == 1){
game();
}else if(choice == 0){
break;
}else{
System.out.println("输入错误，请重试...");
}
}
}
public static void game() {
Random random = new Random();
int toGuess = random.nextInt(100)+1;
Scanner scanner = new Scanner(System.in);
while(true){
System.out.println("请输入你猜测的数：");
int num = scanner.nextInt();
if(num>toGuess){
System.out.println("猜大了");
}else if(num<toGuess){
System.out.println("猜小了");
}else {
System.out.println("恭喜你，猜对了！");
break;
}
}
}
public static int menu() {
System.out.println("***********************");
System.out.println(" 1、play 0、exit ");
System.out.println("***********************");
System.out.println("请输入您的选择：");
Scanner scanner = new Scanner(System.in);
int choice = scanner.nextInt();
return choice;
}