C++ Part 25

Functions

• Breaks code down into manageable chunks to write (and divide across development team)
• Easier to debug – only one idea behind each module
• Easier to maintain – buggy modules may be replaced without worrying about ramifications on other modules
• Outsiders only need to know a module’s interface, not the details of its implementation.
• Avoids duplication of code ⇒ more compact, and also easier to modify if code has bug  

• Predefined functions: e.g., String.length(): String → Int  
• Programmer-Defined functions: used similarly to predefined functions  
  
  This predefined functions need using namespace std;
  

Source : Absolute C++