Question

我的代码将n减去一个数量：

<div class="container application-container">
  <div class="row seven-rows">
    <div class="column text-center image-container">
      <img src="./images/aoe_icons_services_order_management.png" width='69' height='61' alt="e-commerce">
      <p class="mt-2 text-custom">E Commerce</p>
    </div>
    <div class="dropup">
      <div class="dropup-content pt-4 pb-4">
        <div class="row">
          <div class="col-lg-8 ml-5">
            <h3> Innovative Omnichannel E-Commerce Solutions</h3>
            <p>AOE develops flexible and high-performance Enterprise E-Commerce portals. Our solutions digitize business processes and create efficient, profitable platforms for providers and customers.</p>
            <a class="btn btn-custom">E Commerce Solutions</a>
          </div>
          <div class="col-lg-4">

          </div>
        </div>
      </div>
    </div>
  </div>
</div>
<script
  src="https://code.jquery.com/jquery-3.3.1.min.js"
  integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8="
  crossorigin="anonymous"></script>

但是不起作用。

程序运行：

int op = 0,quan,numbers,many;
cout << "Quantity to substract: " << endl;
        cin >> quan;
        cout << "Times to subs quantity:" << endl;
        cin >> many;
        for(int count = 1; count <= many; count++)
        {
            cout << "Insert " << count << " Number" << endl;
            cin >> numbers;                 
            op = quan - numbers;
        }
cout << "Total: " << op << endl;

总数应为Quantity to substract: 10 Times to subs quantity: 5 Insert 1 Number: 1 Insert 2 Number: 1 Insert 3 Number: 1 Insert 4 Number: 1 Insert 5 Number: 1 Total: 9

您能支持我这个问题吗？谢谢

Answer 1

看来这里的目标是从quan中减去所有5个数字。有问题的代码仅减去最后一个。

要减去所有数字，请将结果变量初始化为第一个数字：

op = quan;

并在循环中，从结果变量中减去：

op = op - numbers; // alternatively: op -= numbers

Answer 2

尝试一下：

int op = 0,quan,numbers,many;
cout << "Quantity to substract: " << endl;
        cin >> quan;
        cout << "Times to subs quantity:" << endl;
        cin >> many;
        for(int count = 1; count <= many; count++)
        {
            cout << "Insert " << count << " Number" << endl;
            cin >> numbers;                 
            op = quan - numbers;
            quan = op; // Add this so that new value is assigned to quan
        }
cout << "Total: " << op << endl;

Answer 3

这是因为您从quan减去而未使用op的先前值。每次执行以下操作时，都会在代码中使用op = quan - numbers：您会丢失先前获得的状态。

int op = 0,quan,numbers,many;
cout << "Quantity to substract: " << endl;
        cin >> quan;
        cout << "Times to subs quantity:" << endl;
        cin >> many;
        // make op take the value of quan
        op = quan;
        for(int count = 1; count <= many; count++)
        {
            cout << "Insert " << count << " Number" << endl;
            cin >> numbers;        
            // substract from op           
            op = op - numbers;
        }
cout << "Total: " << op << endl;

减去n倍的int值

3 个答案: