In Class Week8: Thursday

Copy the files for today's class into your week8 directory, then change into that directory and check the contents: 
     % cd ~/cs21/
     % mkdir week8
     % cd  week8
     % cp ~newhall/public/cs21/week8/ptrexample.c  .
     % cp ~newhall/public/cs21/week8/printaddr.c  .
     % cp ~newhall/public/cs21/week8/dynarray.c  .
     % ls
  1. Open up the ptrexample.c and we will trace through it together in class.

  2. Open printaddr.c and add the arguments to the printf statements to printout the specified value. Compile and run your program. What does this tell you about where different variables are located in memory?

  3. Open dynarray.c. You will implement a function that returns a dynamically allocated array of int values initialized with values entered by the user. The function will read in a value for the number of ints to be read in (the size of the array), dynamically allocate an array of that size, and then fill it with values entered by the user. The function will return the dynamically allocated array, and will "return" the size of the array using pass-by-reference.