INFO: Definition of a Domain Error (37223)
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 Q37223 SUMMARY
A domain error occurs when an application passes an invalid value to a
function. The "domain" of a function refers to its arguments; the
"range" of a function refers to the values it returns.
For example, if an application calls the sqrt() function with the
argument -1, a domain error occurs because -1 is not in the domain of
the real number square root function (that is, you can't take the
square root of -1 and receive a real result).
A domain error can also occur if an application calls a function with
an incorrect data type. (For example, if you call a function that
expects a double parameter with an int.) The compiler should produce
warning messages or perform the required conversion if you properly
declare prototypes for each function your application calls (perhaps
by including the appropriate system header file, such as MATH.H).
To avoid a domain error, verify that the value your application passes
to a function has the proper type and that the value is in the
function's domain.
| Modification Type: | Major | Last Reviewed: | 12/12/2003 |
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| Keywords: | kbCRT kbinfo KB37223 |
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