title: Does char array contain string?
body: <p>I have a text file and would like to check if it contains a string.
  The text file is stored in a char array: <code>char buffer[512][128];</code>.</p>
  
  <p>Q1: Is it easier if I buffer it in one long array instead of a multidimensional array?
  Q2: How could I check whether the buffer contains the string <code>char *s1 = "Hello world!";</code>?
      I will need to search for multiple strings.</p>