INFO: Buffer Size for fcvt() and ecvt() Is 349 Bytes (59070)
The information in this article applies to:
- The C Run-Time (CRT), when used with:
- Microsoft Visual C++ for Windows, 16-bit edition 1.0
- Microsoft Visual C++ for Windows, 16-bit edition 1.5
- Microsoft Visual C++, 32-bit Editions 1.0
- Microsoft Visual C++, 32-bit Editions 2.0
- Microsoft Visual C++, 32-bit Editions 4.0
- Microsoft Visual C++, 32-bit Editions 5.0
- Microsoft Visual C++, 32-bit Editions 6.0
This article was previously published under Q59070 SUMMARY
In Microsoft C, the ecvt() and fcvt() routines use a single, statically
allocated buffer while converting floating point numbers to character
strings. The buffer is currently defined as 349 bytes. However, the largest
double-precision variable that can be used is 309 bytes, with 40 bytes for
padding. It is set up to be large enough to accommodate the largest double-
precision number plus 40 decimal places (even though you only have 16
digits of accuracy in a double-precision IEEE number).
| Modification Type: | Major | Last Reviewed: | 12/11/2003 |
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| Keywords: | kbCRT kbinfo KB59070 kbAudDeveloper |
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