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  #1  
Old 07-Sep-2004, 18:08
soccer022483 soccer022483 is offline
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Error??

can someone compile & run this and tell me what the error means...

http://www.anova-design.com/misc/largeint.h
http://www.anova-design.com/misc/main.cpp

main.cpp contains main, and it inlcludes largeint.h

Thanks,

Austin
  #2  
Old 07-Sep-2004, 19:56
soccer022483 soccer022483 is offline
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Exclamation

What's the problem?

Does no one know the answer to http://www.gidforums.com/t-3587.html?
  #3  
Old 07-Sep-2004, 20:34
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Quote:
Originally Posted by soccer022483
Does no one know the answer to this?
What error messages are you getting? What you get may not be what other people get.
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  #4  
Old 07-Sep-2004, 20:47
soccer022483 soccer022483 is offline
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Quote:
Originally Posted by crystalattice
What error messages are you getting? What you get may not be what other people get.

Compiling...
main.cpp
c:\documents and settings\austin\my documents\desktop\desktop\largeint\largeint.h(146) : error C2662: 'Compare' : cannot convert 'this' pointer from 'const class LargeInt' to 'class LargeInt &'
Conversion loses qualifiers
c:\documents and settings\austin\my documents\desktop\desktop\largeint\largeint.h(149) : error C2662: 'Divide' : cannot convert 'this' pointer from 'const class LargeInt' to 'class LargeInt &'
Conversion loses qualifiers
c:\documents and settings\austin\my documents\desktop\desktop\largeint\largeint.h(161) : error C2662: 'Compare' : cannot convert 'this' pointer from 'const class LargeInt' to 'class LargeInt &'
Conversion loses qualifiers
c:\documents and settings\austin\my documents\desktop\desktop\largeint\largeint.h(163) : error C2662: 'Compare' : cannot convert 'this' pointer from 'const class LargeInt' to 'class LargeInt &'
Conversion loses qualifiers
c:\documents and settings\austin\my documents\desktop\desktop\largeint\largeint.h(17 : error C2662: 'Compare' : cannot convert 'this' pointer from 'const class LargeInt' to 'class LargeInt &'
Conversion loses qualifiers
c:\documents and settings\austin\my documents\desktop\desktop\largeint\largeint.h(180) : error C2662: 'Compare' : cannot convert 'this' pointer from 'const class LargeInt' to 'class LargeInt &'
Conversion loses qualifiers
Error executing cl.exe.

main.obj - 6 error(s), 0 warning(s)
  #5  
Old 08-Sep-2004, 00:28
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[edit]Thread was merged.[/edit]

You would be best off asking whoever it was that wrote largeint.h.
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  #6  
Old 08-Sep-2004, 01:36
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Quote:
Originally Posted by soccer022483
can someone compile & run this and tell me what the error means...

largeint.h
main.cpp

main.cpp contains main, and it inlcludes largeint.h

Thanks,

Austin

They mean that you can't change a member data of the object in a const member function:

CPP / C++ / C Code:
LargeInt LargeInt::operator/( LargeInt const& rhs ) const
{
    if( rhs < LargeInt("0") )
        throw overflow_error("ERROR: Overflow in operator/!");    
    
	if( 0==Compare(number, LargeInt("0").number) )
		return LargeInt("0");
	LargeInt oLNQ, oLNDummy;
	Divide(number, rhs.number, oLNQ.number, oLNDummy.number);
	oLNQ.sign = (-1==sign)&&(-1==rhs.sign)||(1==sign)&&(1==rhs.sign) ? 1 : -1;
	return oLNQ;
}

You pass to Compare LargeInt(0), and in it you MODIFY private member data vector<char> number;. You can't do this! I made it run by removing most of your consts....not necesarilly the way to go, but in the time given... (I'm a busy man )

Regards,
Luci
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  #7  
Old 08-Sep-2004, 10:22
soccer022483 soccer022483 is offline
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Quote:
Originally Posted by LuciWiz
They mean that you can't change a member data of the object in a const member function:

CPP / C++ / C Code:
LargeInt LargeInt::operator/( LargeInt const& rhs ) const
{
    if( rhs < LargeInt("0") )
        throw overflow_error("ERROR: Overflow in operator/!");    
    
	if( 0==Compare(number, LargeInt("0").number) )
		return LargeInt("0");
	LargeInt oLNQ, oLNDummy;
	Divide(number, rhs.number, oLNQ.number, oLNDummy.number);
	oLNQ.sign = (-1==sign)&&(-1==rhs.sign)||(1==sign)&&(1==rhs.sign) ? 1 : -1;
	return oLNQ;
}

You pass to Compare LargeInt(0), and in it you MODIFY private member data vector<char> number;. You can't do this! I made it run by removing most of your consts....not necesarilly the way to go, but in the time given... (I'm a busy man )

Regards,
Luci

Thank you so much. I really appreciate your help.

Austin
 
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