bwBASIC/NBS2/P046.run

PROGRAM FILE 46: INTERACTION OF CONTROL STATEMENTS WITH                         
        THE FOR-STATEMENT.                                                      
    ANSI STANDARD 11.2, 11.4, 10.2, 10.4                                        
                                                                                
SECTION 46.1: INTERACTION OF GOSUB-STATEMENT WITH                               
        THE FOR-STATEMENT.                                                      
                                                                                
THIS SECTION TESTS THAT A GOSUB ROUTINE CAN BE EXPECTED                         
FROM WITHIN A FOR-BLOCK.                                                        
                                                                                
               BEGIN TEST.                                                      
                                                                                
CONTROL VARIABLE:                                                               
SHOULD BE      ACTUAL         RESULT                                            
 8              8               OK                                              
 4              4               OK                                              
 0              0               OK                                              
-4             -4               OK                                              
LOOP EXITED                                                                     
-8             -8               OK                                              
                                                                                
NO. TIMES THROUGH LOOP:                                                         
SHOULD BE:  4      ACTUAL:  4     RESULT:   OK                                  
                                                                                
*** TEST PASSED ***                                                             
                                                                                
               END TEST.                                                        
                                                                                
SECTION 46.2: FOR-LOOPS WITH SAME CONTROL-VARIABLE                              
        NESTED DYNAMICALLY WITH GOSUB.                                          
                                                                                
THIS SECTION TESTS THAT A GOSUB ROUTINE CAN BE EXECUTED                         
FROM WITHIN A FOR-BLOCK AND THAT THE SUBROUTINE MAY ITSELF                      
CONTAIN A FOR-BLOCK. IF THE TWO FOR-BLOCKS USE THE SAME                         
CONTROL-VARIABLE, THE ORIGINAL VALUE IS LOST.                                   
                                                                                
               BEGIN TEST.                                                      
                                                                                
CONTROL VARIABLE:                                                               
SHOULD BE      ACTUAL         RESULT                                            
ENTERING OUTER LOOP                                                             
 8              8               OK                                              
ENTERING INNER LOOP                                                             
-10            -10              OK                                              
-8             -8               OK                                              
INNER LOOP EXITED                                                               
-6             -6               OK                                              
OUTER LOOP EXITED                                                               
-9             -9               OK                                              
                                                                                
NO. TIMES THROUGH INNER LOOP:                                                   
SHOULD BE:  2      ACTUAL:  2    RESULT:   OK                                   
                                                                                
                                                                                
NO. TIMES THROUGH OUTER LOOP:                                                   
SHOULD BE:  1      ACTUAL:  1    RESULT:   OK                                   
                                                                                
*** TEST PASSED ***                                                             
                                                                                
               END TEST.                                                        
                                                                                
                                                                                
SECTION 46.3 CONTROL-STATEMENT JUMPS OUT OF FOR-BLOCK.                          
                                                                                
THIS SECTION TESTS THAT YOU CAN JUMP OUT OF A FOR-BLOCK                         
AND THAT THE CONTROL-VARIABLE RETAINS ITS VALUE WHEN                            
THIS HAPPENS.                                                                   
                                                                                
             BEGIN TEST.                                                        
                                                                                
LOOP IS: FOR I1= 33  TO  66  STEP  4                                            
                                                                                
CONTROL VARIABLE:                                                               
SHOULD BE      ACTUAL         RESULT                                            
 33             33              OK                                              
 37             37              OK                                              
 41             41              OK                                              
 45             45              OK                                              
 49             49              OK                                              
 53             53              OK                                              
 57             57              OK                                              
 61             61              OK                                              
JUMPED OUT OF LOOP                                                              
 61             61              OK                                              
                                                                                
NO. TIMES THROUGH LOOP:                                                         
SHOULD BE:  8      ACTUAL:  8      RESULT:   OK                                 
                                                                                
--------------------------------------                                          
                                                                                
LOOP IS: FOR I1= 7  TO  7  STEP  0                                              
                                                                                
CONTROL VARIABLE:                                                               
SHOULD BE      ACTUAL         RESULT                                            
 7              7               OK                                              
 7              7               OK                                              
 7              7               OK                                              
 7              7               OK                                              
 7              7               OK                                              
JUMPED OUT OF LOOP                                                              
 7              7               OK                                              
                                                                                
NO. TIMES THROUGH LOOP:                                                         
SHOULD BE:  5      ACTUAL:  5     RESULT:   OK                                  
                                                                                
***  TEST PASSED  ***                                                           
                                                                                
               END TEST.                                                        
                                                                                
END PROGRAM 46                                                                  
                                                                                
Program interrupted at line 3080