Question

如果语句和总数从未出现，则代码无法正常运行。我无法弄清楚什么是错的。我需要做些什么改变呢？方向如下。

成为健身中心会员的费用如下：（a）高级公民折扣是30％; （b）如果会员资格购买并支付12或者提前几个月，折扣为15％;或（c）如果超过5个人购买培训课程，每次课程的折扣为20％。编写菜单驱动程序，确定新成员资格的成本。您的程序必须包含显示常规信息的方法健身中心及其收费，一种获取所有必要信息的方法确定会员费用，以及确定会员资格的方法成本。使用适当的参数将信息传入和传出方法。

我应该使用哪种方法？

    double grossdiscount1,grossdiscount2,grossdiscount3;
    double grossprice1,grossprice2,grossprice3; 

    //end result of box calculation
    double answerbox1,answerbox2,answerbox3;
    double answerbox1b,answerbox2b,answerbox3b;
    //Jtext inputs
    double box1,box2,box3;

    double discount1 = 0.30 ;
    double discount2 = 0.20 ;
    double discount3 = 0.15 ;
    // prices PT=personal training MT=montly price
    double pricePT =50.00;
    double priceMT =100.00;






    box1 = Double.parseDouble(jTextField1.getText());
    box2 = Double.parseDouble(jTextField2.getText());
    box3 = Double.parseDouble(jTextField3.getText());
// i brought these out of the if statement because the program won't run without
//  them being stated
 answerbox1b=box1*100;
grossdiscount1=(box1*priceMT)*discount3;// the amount saved
grossprice1=(box1*priceMT);
answerbox1=(grossprice1-grossdiscount1);
answerbox2b=(box2*pricePT);
grossdiscount2=(box2*pricePT)*discount2;// the amount saved
grossprice2=(box2*pricePT);
answerbox2=(grossprice2-grossdiscount2);

double total = answerbox1+answerbox2+answerbox1b+answerbox2b;
grossdiscount3=(total*discount3);// the amount saved
grossprice3=total;
answerbox3=(grossprice3-grossdiscount3);




   if(box1<11 )
   {
    answerbox1b=box1*100;
   }
      else if(box1>12)
      {
      grossdiscount1=(box1*priceMT)*discount3;// the amount saved
      grossprice1=(box1*priceMT);
      answerbox1=(grossprice1-grossdiscount1);
      }

   if(box2<5 )
   {
    answerbox2b=(box2*pricePT);
   }
      else if(box2>=5)
      {
      grossdiscount2=(box2*pricePT)*discount2;// the amount saved
      grossprice2=(box2*pricePT);
      answerbox2=(grossprice2-grossdiscount2);
      }

     if(box3==1 )
   {
    grossdiscount3=(total*discount3);// the amount saved
      grossprice3=total;
      answerbox3=(grossprice3-grossdiscount3);
   }
      else if(box3==0);
      {

      }


    jTextField4.setText(String.valueOf(total));

Answer 1

else if语句未正确写入。除掉 ;为了正确的流程。

我还建议您检查与比较Java中的双打相关的任何线程

如果/ else不会排除false语句//方法？

1 个答案: