• arrays and the use of arrays as function arguments;
• the use of structs and how to reference struct components;
• C argument passing mechanisms (dereferencing pointers, etc);
• achieving a kind of the C++ template in C through the use of void * ;
• separation of concerns related to the design and implementation of a server module vs the user or client module.

• Read material on use of the qsort library function (attached to this assignment).
• Read the Kernighan and Ritchie Appendix or Friedman/Koffman Appendixes that contain information about the string.h library.
• Read about C I/O and C argument passing in any book on C that you like (or in Kernighan and Ritchie).

A. We have constructed a text file containing a collection of structs each of which is made up of 4 fields:

• a symbol field containing a character string (max length of 6 characters, including the null character);
• a value field (integer) containing the numeric value of the field;
• a defined field, an enumerated type made up of two enumerators -- e.g., enum status {not_defined, defined}
• a used count field (integer) which contains a count of the number of references to the symbol.

You are to write a program which reads all of the symbol table entries (all of the structs) into memory and sorts them using the qsort routine in the C++ library. Your program should print the struct data as it is read in and then reprint it after the sort. The information in each struct should be printed on a single line (in four columns with appropriate descriptive headers).

Turn In: Listing of a successful run of your program with the output described above.

Due Date: To be determined.

B. Programming (also an individual project) -- Redo the Dice Simulation Program using standard C argument passing and standard C I/O.

Turn In: Just the revised program and its output.

Due Date: To be determined.

CIS 223 Sample Data for Assignment 4-S97 (Part A ONLY):

          LDAC
          11 
          1
          5
          RNUM
          41
          1
          2
          SUM
          898
          1
          3
          LOOP
          881
          1
          1
          STAC
          12
          1
          6
          AVERAG
          897
          1
          2
          PNUM
          42
          1
          2
          ZERO
          892
          0
          2
          ONE
          893
          1
          6
          ADD
          21
          1
          2