problem solving compiler errors

Hi!

I'm in need of assistance for a compiler error, that doesnt like me, and me neither since i dont know how to "eraser" it ;-)

the structs look like this (its a template i am enhancing for my coide)

Code:

typedef struct {
	int ix;
	int iy;
	int ic;
} t_fingertip;

/** List containing all fingertips of the classified probe*/
typedef list<t_fingertip> FINGERLIST;


/** Struct containing all global parameters changeable in the GUI */

typedef struct {
	int   ikValue; //Initial Value of K Parameter
	int   ikMin; //Min Value for K Parameter (should be 6)
	int   ikMax; //Max Value for K Parameter (should be around 50?)
	int   irValue; //Value of radius
	int   irMin; // Min Value of radius
	int   irMax; // Max Value of radius
/*	float fValue;
	float fMin;
	float fMax;*/
	BOOL  bToggle;
	BOOL  bDrawClassification;
	BOOL  bIntelliClassification;
	int   iRadio;
	char  acFilename[PATH_MAX];
} t_GuiOptions;

/** Struct containing local parameters for processing */
typedef struct {
	int iMousePosX;
	int iMousePosY;
	int iWidth;
	int iHeight;
//	BOOL bThumbExist;
//	BOOL bForefingerExist;
//	BOOL bMiddlefingerExist;
//	BOOL bRingfingerExist;
//	BOOL bLittlefingerExist;
	IplImage* ptCvImg;
	IplImage* ptCvResult;
	IplImage* ptCvVSpace;
	t_fingertip ft1;
	t_fingertip ft2;
	FINGERLIST flist;




} t_LocalVariables;

/** Struct containing parameters for a single fingertip   */





/** Streammanipulation for reading and writing the dbfile properly */

ostream& operator<<(ostream& os,const t_fingertip& ft){
	os << ft.ix << ';' << ft.iy << ';' << ft.ic << '\n';
	return os;
}


t_fingertip& operator>>(istream& is, t_fingertip& ft){
	string line;
	int first, last;
	if (!getline(is, line))
		return ft;
	first = line.find_first_of(';');
	last = line.find_last_of(';');
	ft.ix = atoi(line.substr(0, first).c_str());
	ft.iy = atoi(line.substr(first + 1, last - (first + 1)).c_str());
	ft.ic = atoi(line.substr(last + 1, line.size() - (last + 1)).c_str());
// 	cout << ft.x << endl;
// 	cout << ft.y << endl;
// 	cout << ft.c << endl;
	return ft;
}

then i get a compiler error in these lines:

Code:

int loadfile(string filen, t_LocalVariables *ptLocalVars){

string file;

ifstream infile( filen.c_str(), ios::in);
if ( !infile ){
cout << "File " << filen << " failed to load." << endl;
cout << "Using empty state." << endl;
return 0;
}
int i = 0;

while (true) {
	if (!infile)
		break;
	infile >> ptLocalVars.ft1;
	ptLocalVars.flist.push_back(ptLocalVars.ft1);
	++i;

}
ptLocalVars.flist.pop_back();
--i;
cout << "Loaded " << i << " entries from file " << filen << " ." << endl;
return 0;
}

int savefile(string filen, t_LocalVariables *ptLocalVars){
string file = filen;



ofstream outfile( filen.c_str(), ios::out);
if (!outfile){
	cerr << "File " << filen << " failed to open!" << endl;
	return 0;
}
typedef list<t_fingertip>::const_iterator ftiter;
for(ftiter i = ptLocalVars.flist.begin();i != ptLocalVars.flist.end();++i)
	outfile << *i;

return 1;
}

It says:

classification.cc: In function `int loadfile(basic_string<char,string_char_traits<char >,__default_alloc_template<true,0> >, t_LocalVariables *)':
classification.cc:37: request for member `ft1' in `ptLocalVars', which is of non-aggregate type `t_LocalVariables *'
classification.cc:38: request for member `ft1' in `ptLocalVars', which is of non-aggregate type `t_LocalVariables *'
classification.cc:42: request for member `flist' in `ptLocalVars', which is of non-aggregate type `t_LocalVariables *'
classification.cc: In function `int savefile(basic_string<char,string_char_traits<char >,__default_alloc_template<true,0> >, t_LocalVariables *)':
classification.cc:59: request for member `flist' in `ptLocalVars', which is of non-aggregate type `t_LocalVariables *'
classification.cc:59: request for member `flist' in `ptLocalVars', which is of non-aggregate type `t_LocalVariables *'
make: *** [classification.o] Error 1


Who can help me out please?

THanks in advance!

Jan

When using a pointer to a structure, you cannot access its members through '.', but have to use '->', pr dereference the pointer.

Both of these are valid for a pointer:
(*ptLocalVars).ft // dereference, then access through .
and
ptLocalVars->ft1 // use pointer, and then access through ->