Q123161: BUG: ios::internal Adds No Fill Characters for int and long
Article: Q123161
Product(s): Microsoft C Compiler
Version(s): 1.0,1.5,1.51,2.0,2.1,4.0,4.1,4.2,5.0
Operating System(s):
Keyword(s): kbCodeGen kbVC kbVC500bug kbHWx86
Last Modified: 15-FEB-2002
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The information in this article applies to:
- The C/C++ Compiler (CL.EXE), included with:
- Microsoft Visual C++, versions 1.5, 1.51
- Microsoft Visual C++, 32-bit Enterprise Edition, version 5.0
- Microsoft Visual C++, 32-bit Professional Edition, version 5.0
- Microsoft Visual C++, 32-bit Editions, versions 1.0, 2.0, 2.1, 4.0, 4.1, 4.2, used with:
- the hardware: Intel x86
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SYMPTOMS
========
Using member function ios::flags() with flag ios::internal fails to add fill
characters after the leading sign but before the value. This only occurs for
negative integers or negative long integers. For other data types and positive
integers or positive long integers, the flag works correctly.
The following is output from the sample program given under "MORE INFORMATION":
--- Output Starts ---
+ 1234 // Correct, positive integer with space between
+ and 1234.
+ 1234 // Correct, positive long integer.
+ 1234.000 // Correct, positive float.
+ 1234.000 // Correct, positive double.
-1234 // Incorrect, negative integer with no space
between - and 1234.
-1234 // Incorrect, negative long integer.
- 1.23e+003 // Correct, negative float in scientific notation.
- 1.23e+003 // Correct, negative double.
--- Output Ends ---
RESOLUTION
==========
Cast the integer or long integer values to float or double values, and use
manipulator setprecision(0) and ios flag ios::fixed. See the sample code in the
"More Information" section of this article.
STATUS
======
Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.
MORE INFORMATION
================
Sample Code to Reproduce Problem
--------------------------------
/* Compile options needed: none
*/
#include <IOSTREAM.H>
#include <IOMANIP.H>
#pragma warning( disable : 4270 )
#define WIDTH 20
void main( void )
{
int i = 1234;
cout.flags( ios::showpos | ios::internal );
cout << setw(WIDTH) << (int) i << endl;
cout << setw(WIDTH) << (long) i << endl;
cout.precision(3);
cout.flags( ios::showpos | ios::internal | ios::fixed );
cout << setw(WIDTH) << (float) i << endl;
cout << setw(WIDTH) << (double) i << endl;
cout << setw(WIDTH) << (int)-i << endl; // Problem
cout << setw(WIDTH) << (long)-i << endl; // Problem
// The following two lines show how to work around the problem.
// cout << setprecision(0) << setw(WIDTH) << (float)-i << endl;
// cout << setprecision(0) << setw(WIDTH) << (float)-i << endl;
cout.precision(3);
cout.flags( ios::showpos | ios::internal | ios::scientific );
cout << setw(WIDTH) << (float)-i << endl;
cout << setw(WIDTH) << (double)-i << endl;
}
Additional query words: kbVC400bug buglist1.50 buglist1.00 buglist2.00
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Keywords : kbCodeGen kbVC kbVC500bug kbHWx86
Technology : kbVCsearch kbAudDeveloper kbCVCComp
Version : :1.0,1.5,1.51,2.0,2.1,4.0,4.1,4.2,5.0
Issue type : kbbug
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