Error C2512: no appropriate default constructor... (Tricky)

[4g_pull]

Hi...

Can someone help me resolve VS 2008 error C2512: no appropriate default constructor available? Being sort of a newbie, I was unsuccessful in obtaining an answer via FAQs.

Source file:

#include "MGRS.h"

...

int main(int argc, char* argv[])

{

...

MGRS CFG; // Line 375
MGRSorUSNGCoordinates* mgrs_coord = CFG.convertFromGeodetic(geodeticCoordinates, Precision ); // Line 376

...

mgrs.cpp(375) : error C2512: 'MSP::CCS::MGRS' : no appropriate default constructor available)

Header file MGRS.h:

...

#include "CoordinateSystem.h"

namespace MSP
{
namespace CCS
{
class UPS;
class UTM;
class EllipsoidParameters;
class MGRSorUSNGCoordinates;
class GeodeticCoordinates;
class UPSCoordinates;
class UTMCoordinates;

class MGRS : public CoordinateSystem

{

public:

MGRS( double ellipsoidSemiMajorAxis, double ellipsoidFlattening, char* ellipsoidCode );


MGRS( const MGRS &m );


~MGRS( void );


MGRS& operator=( const MGRS &m );

EllipsoidParameters* getParameters() const;

MSP::CCS::MGRSorUSNGCoordinates* convertFromGeodetic( MSP::CCS::GeodeticCoordinates* geodeticCoordinates, long precision );

...


Thanks
Bob

[adeyblue]

MGRS( double ellipsoidSemiMajorAxis, double ellipsoidFlattening, char* ellipsoidCode );

This constructor takes 3 arguments

MGRS CFG; // Line 375

You are providing none.

You either have to give CFG constructor the three arguments it requires, or create another constructor that can be called without arguments. You lose the default no-argument constructor as soon as you create a user defined one.

Also use code tags, like it says in this easy to miss thread << !! Posting Code? Read this First !! >>

[4g_pull]

It worked. Thanks!

MGRS CFG( semiMajorAxis, flattening, ellipsoidCode );
MGRSorUSNGCoordinates* mgrs_coord = CFG.convertFromGeodetic( geodeticCoordinates, Precision );

[Thomas Grauer]

I am having some issues as well:

	MSP::CCS::MGRS l_MGRS( 6378137., 1.0 / 298.257223563, "WE" );
	MSP::CCS::GeodeticCoordinates l_GeodeticCoordinates( MSP::CCS::CoordinateType::transverseMercator, -98, 38, 0 );

	MSP::CCS::MGRSorUSNGCoordinates *l_MGRSorUSNGCoordinates = l_MGRS.convertFromGeodetic( &l_GeodeticCoordinates, 10 );
	// 'MSP::CCS::CoordinateConversionException'

The last function returns with a CoordinateConversionException. Everything seems in order, not sure what the issue is. Help?

OSX 10.6.6
Xcode 3.2.5
Obj C++

Thomas

[Elysia]

You failed to mention the error.

[Thomas Grauer]

You failed to mention the error.

terminate called after throwing an instance of 'MSP::CCS::CoordinateConversionException'
Program received signal:  “SIGABRT”.

thanks!

[Mr.777]

The description tells that you didn't define the constructor as you are using it...
Forexample, if you have defined copy or parametrized constructor, and not default, it should generate an error... So, see clearly...

[Elysia]

The description tells that you didn't define the constructor as you are using it...
Forexample, if you have defined copy or parametrized constructor, and not default, it should generate an error... So, see clearly...

What? You mean this error...

terminate called after throwing an instance of 'MSP::CCS::CoordinateConversionException'

...is because of some constructor?

The error is because you aren't using the class correctly. How it should be properly used is best commented on by someone who has read the documentation for the library.
Since I don't have, nor have any link, I am not qualified to say what's wrong.

[Thomas Grauer]

As it turned out I was using a precision of '10' ( 5 easting, 5 northing ) which is how the military refers to it. In the case of this library it wants the precision of one axis so the precision I was looking for was 5.

Thomas

[Thomas Grauer]

Is there a way with geotrans 3.1 to validate an MGRS coordinate string before attempting conversions ( which in my case crashes ugly )?

thanks!
Thomas