Structured Programming in Basic Problems

© 1998 by Dr. Thomas W. MacFarland -- All Rights Reserved

     Instructions:   Review the following program and see if you can 
                     predict the outcome by completing a "pencil 
                     trace" of the code.  

                     Program output is provided at the end of this 

     Compiler:       The program was prepared using GWBasic, which  
                     requires the use of line numbers.

10 REM This program demonstrates READ and DATA statements.
20 FOR X = 1 TO 4
30   READ Y$, Z$
40   PRINT Y$, Z$
99 END
100 DATA DEF, P08
101 DATA ABC, X12
102 DATA XYZ, Z23
103 DATA LMN, U99
104 DATA CSE, X89
105 DATA GEM, E01  ' Notice how there are more than 4 sets of data.
10000 REM And the answer is ...
10010 REM DEF           P08
10020 REM ABC           X12
10030 REM XYZ           Z23
10040 REM LMN           U99

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