将多个集合元素合并到一个集合中
我想知道是否有任何 std 库或 boost 工具可以轻松地将多个集合的内容合并为一个.
I would like to know if there is any std library or boost tool to easily merge the contents of multiple sets into a single one.
就我而言，我有一些想要合并的整数集.
In my case I have some sets of ints which I would like to merge.
推荐答案
你可以这样做:
std::set<int> s1;
std::set<int> s2;
// fill your sets
s1.insert(s2.begin(), s2.end());
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