Vector elements

This is a discussion on Vector elements within the C++ Programming forums, part of the General Programming Boards category; I have a number and a vector; How can I check if a number is an element of a vector? ...

  1. #1
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    Vector elements

    I have a number and a vector;
    How can I check if a number is an element of a vector?
    Thank you

  2. #2
    Cat without Hat CornedBee's Avatar
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    Use the std::find algorithm.
    All the buzzt!
    CornedBee

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
    - Flon's Law

  3. #3
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    Code:
    for (int i=0; i<vec.size(); ++i)
    {
       if (vec[i] == number)
       {
          cout << number << " is an element of vector." << endl;
          break;
       }
    }

  4. #4
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    no vector size

    Is there any way that I could do it without a loop or vector size?

  5. #5
    Cat without Hat CornedBee's Avatar
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    Not really. My method avoids calling size() and has no visible loop, but it's just hidden.
    All the buzzt!
    CornedBee

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
    - Flon's Law

  6. #6
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    >Is there any way that I could do it without a loop or vector size?
    Use find() from header <algorithm> like CornedBee suggested.

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