输入一个数，输出他的二进制码

    int a =Integer.parseInt(JOptionPane.showInputDialog
      (null,"请输入一个数："));
    int e = a;
    int c = 0;
//    求出这个数的二进制长度
    while(a!=0){
      a =a/2;
      c++;
    }
//    将二进制码变为数组并反向赋值
    int [] d = new int[c];
    int j = c-1;
    while(e!=0){
      d[j] =e%2;
      e =e/2;
      j--;
      }
    for (int i = 0; i < d.length; i++) {
  System.out.print(d[i]);
 }
   }

转载于:https://www.cnblogs.com/q-uan/p/8645703.html