INFO: Jumping into the Middle of a For Loop Is Not Recommended

Last reviewed: August 26, 1997
Article ID: Q19972

The information in this article applies to:
  • Microsoft C for MS-DOS, versions 5.1, 6.0, 6.0a, 6.0ax
  • Microsoft C for OS/2, versions 5.1, 6.0, 6.0a
  • Microsoft C/C++ for MS-DOS, version 7.0
  • Microsoft Visual C++ for Windows, versions 1.0, 1.5
  • Microsoft Visual C++ 32-bit Edition, versions 1.0, 2.0, 2.1, 4.0, 5.0

SUMMARY

In Microsoft C and in Microsoft C/C++, the goto statement and its corresponding label must be part of the same function; no other restrictions apply. However, because different compilers optimize for loops and allocate stack space for automatic variables in various ways, using a goto statement to transfer flow-of-control into the middle of a for loop is not portable and is considered unsafe.

The most common use for the goto statement in structured programming involves error handling. In these cases, the goto statement usually leads out of a deeply nested for loop.

Keywords          : CLngIss kbfasttip
Version           : MS-DOS:5.1,6.0,6.00a,6.00ax,7.0; WINDOWS:1.0,1.5; WINDOWS  NT:1.0,2.0,4.0,5.0
Platform          : MS-DOS NT WINDOWS
Issue type        : kbinfo


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Last reviewed: August 26, 1997
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