What is the definition of composition?

PLEASE READ MY NOTE FIRST.  Note: The following are the contents of a flex file that will be used to implement a lexical analyzer for a subset of the C programming language. I cannot understand anything in the code given below, so I need your help. I need you to explain every section of the code to me step-by-step in detail. At the end, please summarize what the code is all about and how it is functioning.   Here's the code from the Flex file: %option noyywrap   %{ #include<bits/stdc++.h> using namespace std;   ofstream yyoutlog; //output filestream for log file   string loglist = ""; //list of tokens along with line numbers   // define necessary c++ variables and functions here (if any) int lines = 1;   %}   /* Regular Definitions */   delim [ \t\v\r]   /* write regular expressions for whitespace and newline */ ws     newline     letter_ [A-Za-z_] digit [0-9]   /* write regular expressions for id, float and integers */ id       %%   {ws} { /* ignore whitespace */ }   {newline} {…

What exactly is meant by the term "implicit conversion rules"?

What are the challenges and best practices in debugging programs with deeply nested or highly interconnected functions?