输入三个数，找出最大一个数，并打印出来  

  public static void main(String[] args) {
        Scanner scan=new Scanner(System.in);
        int x= scan.nextInt();
        int y= scan.nextInt();
        int z= scan.nextInt();
        if (x>y&&x>z){
            System.out.println(x);
        }else if(z>y&&z>x) {
            System.out.println(z);
        }else if(y>x&&y>z) {
            System.out.println(y);
        }
    }