Q60131: Problem with MID$ Statement and MID$ Function in QBX.EXE
Article: Q60131 Product(s): See article Version(s): 7.00 7.10 Operating System(s): MS-DOS Keyword(s): ENDUSER | SR# S900315-77 buglist7.00 buglist7.10 | mspl13_basic Last Modified: 20-SEP-1990 Using the MID$ function as an argument of the MID$ statement can produce incorrect results in the QBX.EXE environment that comes with Microsoft BASIC Professional Development System (PDS) versions 7.00 and 7.10, as shown in the program below. The problem does not occur when compiled with the BC.EXE environment of Microsoft BASIC PDS 7.00 and 7.10; with the BC.EXE or QB.EXE environment of Microsoft QuickBASIC version 4.00, 4.00b, or 4.50; or with the BC.EXE or QB.EXE environment of Microsoft BASIC Compiler versions 6.00 and 6.00b. Microsoft has confirmed this to be a problem in the QBX.EXE environment of Microsoft BASIC PDS versions 7.00 and 7.10. We are researching this problem and will post new information here as it becomes available. The program below should correctly output "1212345678". However, when run from within the QBX.EXE environment, it incorrectly outputs "1212121212". This behavior also occurs if a length% argument of 10 is used in the MID$ function. If 8 or 9 is used as the length% argument of the MID$ function, the correct output is produced. If the start% argument of the MID$ function is not taken to be 1, correct output displays. Code Example ------------ A$= "1234567890" MID$(A$, 3) = MID$(A$, 1) PRINT A$ Note: The first MID$ occurrence above is the MID$ statement, and the second occurrence is the MID$ function.
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