Help Finding Error In std::find code

[Adam Teasdale Hartshorne]

I would be extremely grateful if somebody could tell me what as I
getting wrong with this little bit of code to find the index of a
particular element in a std::vector

std::vector<int > allVertices ;
getTriangleVert ices(t[0], allVertices) ; //Fills the allVertices vector
getTriangleVert ices(t[1], allVertices) ;

print("All Vertices", allVertices) ;

std::vector<int > tempSpareVertex (getUniqueEleme nts(allVertices )) ;
print("Temp Spare Vertices", tempSpareVertex ) ;

std::vector<int >::const_iterat or it (std::find(allV ertices.begin() ,
allVertices.end (), tempSpareVertex[0]));

int index = it - allVertices.beg in() ;
printf("Spare Vertex 0 Position:- %i \n", index) ;

and the debug shows things like this

All Vertices: 72 6 50 50 6 46
Temp Spare Vertices: 46 72
Spare Vertex 0 Position:- 2

which is clearly the wrong index.
Adam

[Dave Townsend]

"Adam Teasdale Hartshorne" <ad**@dcs.warwi ck.ac.uk> wrote in message
news:dd******** **@mail.dcs.war wick.ac.uk...

I would be extremely grateful if somebody could tell me what as I
getting wrong with this little bit of code to find the index of a
particular element in a std::vector

std::vector<int > allVertices ;
getTriangleVert ices(t[0], allVertices) ; //Fills the allVertices vector
getTriangleVert ices(t[1], allVertices) ;

print("All Vertices", allVertices) ;

std::vector<int > tempSpareVertex (getUniqueEleme nts(allVertices )) ;
print("Temp Spare Vertices", tempSpareVertex ) ;

std::vector<int >::const_iterat or it (std::find(allV ertices.begin() ,
allVertices.end (), tempSpareVertex[0]));

int index = it - allVertices.beg in() ;
printf("Spare Vertex 0 Position:- %i \n", index) ;

and the debug shows things like this

All Vertices: 72 6 50 50 6 46
Temp Spare Vertices: 46 72
Spare Vertex 0 Position:- 2

which is clearly the wrong index.
Adam

Please post a working piece of code, clearly the code you posted is not
valid. Here is
a working demonstration that std::find is working correctly for the data you
have given:

int main(int argc, char* argv[])
{
std::vector<int > allVertices ;
std::vector<int > tempSpareVertex ;
allVertices.pus h_back(72);
allVertices.pus h_back(6);
allVertices.pus h_back(50);
allVertices.pus h_back(50);
allVertices.pus h_back(6);
allVertices.pus h_back(46);
tempSpareVertex .push_back(46);
tempSpareVertex .push_back(72);

vector<int>::co nst_iterator it (std::find(allV ertices.begin() ,
allVertices.end (), tempSpareVertex[0] ));
int index = it - allVertices.beg in() ;
printf("Spare Vertex 0 Position:- %i \n", index) ; // prints 5 like we
expected.
return 0;
}