title: Cumulative sum of an array using recursion in C
body: <p>I want to write a function in C <code>void cumsum(int *array, int length)</code> that receives an array as an input then changes its element of that array to the cumulative sum using RECURSION. For instance if i have <code>array = {1,2,3}</code> the output should be <code>array={1,3,6}</code>.</p>
  
  <p>So, how I can do this using recursion. </p>