Two Functions


You introduce functions with a program that calls – or makes use of –  two functions. So, you have main(), which is included in every program,  and you have firstFunction() and secondFunction().  Each time a  function finishes, program control is returned to whatever called the  function. In this case, that is main(). The code and output are as  follows:


If you have any issues with the code as provided, please try the following updates to the program.

  1. The compiler is looking for the data types of the return values for the function prototypes.  
    In this example, the two functions do not return values, so void is used to indicate no value will be returned.  
    Corrections for the function prototypes
  2. As usual this term, add a 0 to the return line.  We  discussed why we do this during Unit 3’s lecture and in Unit 2’s  discussion board.
    Corrections for the return line in main()
  3. Since we indicated in our function prototypes that our  functions would not return values, we’ll need to indicate the same in  our function definitions.  Add void in the place of the return data type  for each function.
    Corrections for the function definitions

Notice the functions are “prototyped,” that is, the function definition is written above main() and followed with a semi-colon.

The flowchart for the code is as follows:

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