输出:1100
输入:100
输出:1100100
Scanner scanner=new Scanner(System.in); int DEC=scanner.nextInt(); String BIN=""; // System.out.println(DEC%2); while (DEC!=0){ BIN=(DEC%2)+BIN; System.out.println(DEC%2); DEC=(int)(DEC/2); } // System.out.println(new StringBuffer(BIN).reverse().toString()); System.out.println(BIN);