Porting from g++ to VC6

Hello! I'm presently trying to port a school project from g++ to VC and I'm having a few problems. Right now I'm trying to port a simple vector class.

#include <stdio.h> //sprintf
#include <math.h>
#include <iostream.h>
#include <limits.h>

class vector2 {
public:
...constructors
...class functions

//For input and output
istream &input(istream &is) {
is.ignore(INT_MAX,'(');
is >> x;
is.ignore(INT_MAX,',');
is >> y;
is.ignore(INT_MAX,')');
return is;
}
};

this generates errors:

>syntax error : missing ';' before '&'
>'istream' : missing storage-class or type specifiers

Are there a lot of differences in syntax within class declarations in VC compared to g++?

Do I have to tell the linker to include the math library somhow?

Well, any help is appreciated:)

If you know of any web pages dealing with moving from gcc&g++ to MSVC feel fre to point me to em:D

What you have posted compiles fine for me (in VC++ 6.0). You will have to post more code or post the exact compiler error including line #'s (and the code on those lines).

gg

Opps should've tried that myself before I posted...doh

Anyway..this is the entire vector class

Below is a sample cpp file and the entire vectorclass.

Thank you very much for taking your time with this btw.

/*--------------------------------------------------
Sample.cpp FRAX
--------------------------------------------------*/
#include "vector2.h"

void main()
{
vector2 v2TestVector1(0.1,0.4);
return;
}



And this is the vector class


/////////////////////////////////////////////////////////////////////////////
// Filename: vector2.h
// Description: 2D vector class
/////////////////////////////////////////////////////////////////////////////

#ifndef __vector2_h
#define __vector2_h

#include <stdio.h> //sprintf
#include <math.h> //sqrt[abs],acos[angle]
#include <iostream.h>
#include <limits.h>

class vector2 {
public:
float x,y;

public:
vector2():x(),y() {}
vector2(float xx,float yy):x(xx),y(yy) {}
vector2(const vector2 &v):x(v.x),y(v.y) {}

// [] operator to get elements
float &operator [](int i) {return (&x)[i];}
const float &operator [](int i) const {return (&x)[i];}

//assignment operator
vector2 &operator =(const vector2 &v) {x=v.x; y=v.y; return *this;}

//relation operators
bool operator ==(const vector2 &p) const {return ((x==p.x)&&(y==p.y));}
bool operator !=(const vector2 &p) const {return !((*this)==p);}

//simple arithmetics
vector2 &operator+=(const vector2 &p) {x+=p.x;y+=p.y;return *this;}
vector2 operator + (const vector2 &p) const {return vector2(x+p.x,y+p.y);}

vector2 &operator-=(const vector2 &p) {x-=p.x;y-=p.y;return *this;}
vector2 operator - (const vector2 &p) const {return vector2(x-p.x,y-p.y);}
vector2 operator - () const {return vector2(-x,-y);}

vector2 &operator*=(float f) {x*=f;y*=f;return *this;}
vector2 operator * (float f) const {return vector2(x*f,y*f);}

vector2 &operator/=(float f) {x/=f;y/=f;return *this;}
vector2 operator / (float f) const {return vector2(x/f,y/f);}

//scalar product
float operator * (const vector2 &v2) const {return x*v2.x+y*v2.y;}

//z component of vector product
float operator ^ (const vector2 &v2) const {return x*v2.y-y*v2.x;}

//abs by definition
float abs() const {return sqrt((*this)*(*this));}

//For input and output

istream &input(istream &is) {
is.ignore(INT_MAX,'(');
is >> x;
is.ignore(INT_MAX,',');
is >> y;
is.ignore(INT_MAX,')');
return is;
}

virtual ostream &output(ostream &os) const {
os.precision(3);
os << "vector2(" << x << ", " << y << ")";
return os;
}

};


//wrong order multiply
inline vector2 operator *(float f, const vector2 &v) {return v*f;}

inline istream &operator >>(istream &is,vector2 &v) {
return v.input(is);
}

inline ostream &operator <<(ostream &os,vector2 const &v) {
return v.output(os);
}


#endif //__vector2_h

/////////////////////////////////////////////////////////////////////////////
// END OF FILE //
/////////////////////////////////////////////////////////////////////////////

Compiles fine for me (apart from a few warnings). Whats not working for you?

Also, when you post code, use code tags.

gg

LOL, what a weird problem this has been. I think it's my VC6 setup that's playing tricks on me.

I think it might be because I used some strange variant of STLport when I compiled some CVS code earlier. I also installed a new platform SDK and probably messed things up there as well.

I removed these libraries from my include path but now I seem to get problems with the linker instead of syntax errors.

Perhaps I should give my computer the stab of death and just reinstall everything.

Thank you very much for your help. Without it I would never have found this out:)

And I'll use the code tags in the future:)


Edit: Now it works great, finaly I can continue:)