title: Short C++ program to increment characters in input
body: <p>So I know this program is simple, but I just need a little help. The task is to write a short program where I get the user input and the output should print the first character once and the second character twice, and the third character thrice, and so on. </p>
  
  <p>example input: <code>abcd</code></p>
  
  <p>example output: <code>abbcccdddd</code></p>