std::mismatch is an STL algorithm to find a mismatch between two containers.


#include <algorithm>

#include <cassert>

#include <vector>



int main()

{

  std::vector<int> v;

  v.push_back(0);

  v.push_back(1);

  v.push_back(2);

  v.push_back(3);



  std::vector<int> w(v);



  assert(v==w);



  assert(std::mismatch(v.begin(),v.end(),w.begin())

    == std::make_pair(v.end(),w.end()));



  w[1] = 42;



  assert(std::mismatch(v.begin(),v.end(),w.begin())

    == std::make_pair(v.begin()+1,w.begin()+1));



}

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(C++) std::mismatch