Q32499: PRINT Does Not Scroll Line 25 after a SHELL
Article: Q32499 Product(s): See article Version(s): 4.00 4.00b Operating System(s): MS-DOS Keyword(s): ENDUSER | buglist4.00 buglist4.00b fixlist4.50 | mspl13_basic Last Modified: 12-DEC-1989 The code example below does not work correctly when compiled in QuickBASIC Versions 4.00 or 4.00b (in the environment or in an .EXE program) or in Microsoft BASIC Compiler Versions 6.00 and 6.00b for MS OS/2 and MS-DOS. The first line printed after returning from a SHELL statement is printed on line 25 and does not scroll when something else is printed after it (i.e., the subsequent PRINT statements are printed above line 25). Microsoft has confirmed this to be a problem in QuickBASIC Versions 4.00 and 4.00b and in Microsoft BASIC Compiler Versions 6.00 and 6.00b for MS-DOS and OS/2 (buglist6.00, buglist6.00b). This problem was corrected in QuickBASIC Version 4.50 and in Microsoft BASIC PDS Version 7.00 (fixlist7.00). The workaround is to send output to the console ("cons:") device using the PRINT# statement, as shown below. The following code demonstrates the problem: PRINT "before shell" SHELL PRINT "after shell1" PRINT "after shell2" INPUT a$ PRINT a$ END The workaround is to print to the console ("cons:") device, as in the following program: OPEN "cons:" FOR OUTPUT AS #1 PRINT #1, "before shell" SHELL PRINT #1, "after shell1" PRINT #1, "after shell2" INPUT a$ PRINT #1, a$ END
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