使用 For 循环使队列入队和出队 - C++

Question

我正在学习关于队列的课程，但对于可能不是用户输入的项目（例如文件。我尝试运行一个 for 循环，以便将某些项目排入队列，例如仅将偶数整数（来自列表 1-10）放入队列：

for(int i = 1; i <= 10; i++)
{
   if(i % 2 == 0)
      while(intQueue.enqueue(i))
          cout << i << " has been added to the queue . . .\n";
}

但由于某种原因，我只会在重复时将第一项添加到队列中：

2 has been added to the queue . . .
2 has been added to the queue . . .
2 has been added to the queue . . .
2 has been added to the queue . . .
2 has been added to the queue . . .

我想知道是不是我做的不对，或者是否有其他方法可以将某些项目排入队列。非常感谢任何帮助或提示。

Answer 1

只要intQueue.enqueue(i)) 返回的值等于true，while(intQueue.enqueue(i)) 就会继续执行。

你需要使用的是if。

for(int i = 1; i <= 10; i++)
{
   if (i % 2 == 0)
   {
      if (intQueue.enqueue(i))
          cout << i << " has been added to the queue . . .\n";
      else
          cout << i << " has not been added to the queue . . .\n";
   }
}