All of the answers so far have copied a vector to a set. Since you asked to 'convert' a vector to a set, I'll show a more optimized method which moves each element into a set instead of …

2011年12月31日 · Of course you could maintain a vector of unique items, but your performance would suffer a lot when you do set-oriented operations. For example, assume that you have a …

2012年7月5日 · How to do the vector of sets in C++? I want to have a set for the different levels that are in my code. A set at each level will be holding integer values. The number of these …

2011年4月8日 · If vector < set< char >> v is exactly what you've got there (I hope you cut and pasted), you've run into one of the annoying little features of C++. Those >> look to you like …

2009年11月3日 · If your vector contains POD types, it is safe to use memset on it - the storage of a vector is guaranteed to be contiguous. memset(&vec[0], 0, sizeof(vec[0]) * vec.size()); Edit: …

2013年7月9日 · Have a vector of zeroes ready, then switch it with current vector when you need zeroes: std::vector<int> zeroes(N,0); std::vector<int> currentVec(N); ...

2014年6月30日 · You're close. You need to pull the vector out of the set iterator. See below. main() { std::set< std::vector<int> > conjunto; std::vector<int> v0 = std::vector<int>(3 ...

2019年8月27日 · I am trying to create a set of vectors in C++. I want the vectors [1,2] and [2,1] to be considered equal in the set. So both should not exist in the set. Also a vector can have the …

2009年7月17日 · I have a vector of booleans. I need to set its elements from n-th to m-th to true. Is there an elegant way to do this without using a loop? Edit: Tanks to all those who pointed …

So, I created a vector: std::vector<int> vec = {10, 20, 30, 40, 50}; and I ran std::cout << vec[5]; multiple times in my gcc and every time, it displayed 0. On the other hand, when I tried running …