pop a specific element off a vector in c++

Question

Suppose I have a vector v and it has three elements: {1,2,3}.

Is there a way to specifically pop 2 from the vector so the resulting vector becomes {1,3}.

Answer 1

Assuming you're looking for the element containing the value 2, not the value at index 2.

#include<vector>
#include<algorithm>

int main(){
   std::vector<int> a={1,2,3};
   a.erase(std::find(a.begin(),a.end(),2));
}

(I used C++0x to avoid some boilerplate, but the actual use of std::find and vector::erase doesn't require C++0x)