Is some value in a vector

[willvf]

Hi I am trying to make an if statement that asks if a number is a member of a vector but am not sure how to do this? I want something of the form:

if(number is an entry in vector_name) do whatever;

Thank you

[Zhuge]

Try the find() function.
http://cplusplus.com/reference/algorithm/find/

You'd probably end up with something like:
std::find(vector_name.begin(), vector_name.end(), number)

[kooth]

You might look at input iterators such as find().

[wolfgang]

#include <iostream>
#include <vector>
#include <algorithm>

int main()
{
  std::vector<int> myvector;
  myvector.push_back(12);
  myvector.push_back(23);
  myvector.push_back(52);
  myvector.push_back(1);

  int key = 2;

  if ( std::find (myvector.begin(), myvector.end(), key) != myvector.end() )
    std::cout << "FOUND IT!" << std::endl;

  return 0;
}

Easy.

[kooth]

Good job Zhuge and wolfgang!

[willvf]

I got it now, thanks all