c++不支持命名循环，就像Java和其他语言一样。您可以使用goto，或创建您使用的标志值。在每个循环结束时检查标志值。如果它被设置为true，那么您可以跳出该迭代。

  while (i<n) {
    bool shouldBreakOuter = false;
    for (int j=i + 1; j<n; ++j) {
      if (someCondition) {
          shouldBreakOuter = true;
      }
    }

    if (shouldBreakOuter == true)
      break;

  }

Break将只退出包含它的最内层循环。

你可以使用goto来跳出任意数量的循环。

当然，goto通常被认为是有害的。

使用break函数[…]是否合适?

使用break和goto会使判断程序的正确性变得更加困难。请看这里关于这个问题的讨论:Dijkstra不是疯子。

Breaking out of a for-loop is a little strange to me, since the semantics of a for-loop typically indicate that it will execute a specified number of times. However, it's not bad in all cases; if you're searching for something in a collection and want to break after you find it, it's useful. Breaking out of nested loops, however, isn't possible in C++; it is in other languages through the use of a labeled break. You can use a label and a goto, but that might give you heartburn at night..? Seems like the best option though.

一个使用goto和标签跳出嵌套循环的代码示例:

for (;;)
  for (;;)
    goto theEnd;
theEnd:

这个怎么样?

for(unsigned int i=0; i < 50; i++)
{
    for(unsigned int j=0; j < 50; j++)
    {
        for(unsigned int k=0; k < 50; k++)
        {
            //Some statement
            if (condition)
            {
                j=50;
                k=50;
            }
        }
    }
}