bwBASIC/NBS2/P168.run

PROGRAM FILE 168: EXCEPTION - OVERFLOW IN THE SUBSCRIPT                         
        OF AN ARRAY.                                                            
    ANSI STANDARD 6.4, 6.5, 7.5                                                 
                                                                                
THIS PROGRAM TESTS THAT THE RECOVERY PROCEDURES FOR                             
EXCEPTIONS OCCURRING DURING THE EVALUATION OF NUMERIC                           
EXPRESSIONS WORK PROPERLY IN CONTEXTS OTHER THAN SIMPLE                         
ASSIGNMENT OF THE EXPRESSION TO A VARIABLE. SPECIFICALLY,                       
AN EXPRESSION IS USED AS A SUBSCRIPT OF AN ARRAY.                               
                                                                                
SECTION 168.1: EXCEPTION - OVERFLOW IN THE SUBSCRIPT                            
        OF AN ARRAY.                                                            
                                                                                
TO PASS THIS TEST:                                                              
                                                                                
    1) A MESSAGE IDENTIFYING THE OVERFLOW EXCEPTION MUST                        
       BE DISPLAYED,                                                            
                                                                                
    2) POSITIVE INFINITY MUST BE SUPPLIED AS THE VALUE                          
       OF THE SUBSCRIPT AND EXECUTION CONTINUES,                                
                                                                                
    3) WHEREUPON AN EXCEPTION MUST BE REPORTED                                  
       FOR SUBSCRIPT OUT OF RANGE, AND                                          
                                                                                
    4) EXECUTION MUST TERMINATE.                                                
                                                                                
                   BEGIN TEST.                                                  
                                                                                
ABOUT TO EVALUATE Z(9999^9999), WHERE Z(I) = I + 100.                           
                                                                                
*** Arithmetic Overflow ***                                                     
                                                                                
ERROR in line 390: Subscript out of range