c++ - STL容器:在两个迭代器之间进行迭代

我将值存储在std::map中

我在映射中找到两个值，并且想要在第一项到最后一项之间进行迭代-但是未实现

    void foobar(const DatedRecordset& recs, const double startstamp, const double endtstamp)
    {
        DatedRecordsetConstIter start_iter = recs.lower_bound(startstamp), end_iter = recs.lower_bound(endtstamp);

        // Can't do this .... (<= not defined)
        //for (DatedRecordsetConstIter cit = start_iter; cit <= end_iter; cit++ )

        / So have to resort to a hack like this:
        for (DatedRecordsetConstIter cit = start_iter; cit != recs.end(); cit++ ) {
            if ((*cit).first <= (*end_iter).first){
               //do something;
            }
            else
               break;
            }
       }
}

在两个已知的迭代器之间是否有更优雅的迭代方法？

最佳答案

使用!=而不是<=，它将执行您想要的操作。

void foobar(const DatedRecordset& recs, const double startstamp, const double endtstamp)
{
    DatedRecordsetConstIter start_iter = recs.lower_bound(startstamp),
                            end_iter = recs.upper_bound(endtstamp);

    for (DatedRecordsetConstIter cit = start_iter; cit != end_iter; ++cit) {
    }
}