public static void main(String[] args){
Scanner s = new Scanner(System.in);
System.out.println("请输入数字:");
int q = s.nextInt();
if( q%5==0||q%7==0 ){
System.out.print("是5和7的倍数");
}else {
System.out.print("不是5和7的倍数");
}
do{
System.out.println("按任意键继续,按n退出");
q=s.next().charAt(0);
}while(q!='n');
这是我打的不能进行二次判断