title: C++ full number of degree
body: <p>This is a simple code that counts two to the right degree. Starting from somewhere around 60 degrees the answer is incorrect.
  I need to count 2^200. The answer shouldn't be in the form like "1.606938e+60", but by numbers. How to do this in C++?</p>
  
  <pre><code>#include &lt;iostream&gt;
  
  using namespace std;
  
  int main()
  {
    unsigned long long int n,z;
    cin&gt;&gt;n;
    z=pow(2,n);
    cout&lt;&lt;z&lt;&lt;endl;
  
    return 0;
  }
  </code></pre>