what is that I have to define to use += or *=?

std::map<unsigned int,std::vector<std::vector<double> > > normal;
std::map<unsigned int, std::vector<std::vector<double> > >::iterator it_Set;

for(it_Set = mSetContactNormals.begin(); it_Set != mSetContactNormals.end(); ++it_Set)
{
std::vector<std::vector<double> > vectorSet(it_Set->second);
std::vector<std::vector<double> >::iterator it_vs;
Vector<double> ac_normal(3,0.00);

for(it_vs = vectorSet.begin(); it_vs != vectorSet.end(); ++it_vs)
{
Vector<double> normal_in_set(*it_vs);
ac_normal += normal_in_set; // error here

}

ac_normal *= (1.00/sqrt(std::inner_product(ac_normal.begin(),ac_normal.end(),ac_normal.begin(),0.00))); //errors 1,2

mContactNormals[it_Set->first] = ac_normal; //3
}

1-error C2784: 'class std::complex<_Ty> &__cdecl std::operator *=(class std::complex<_Ty> &,const class std::complex<_U> &)' : could not deduce template argument for 'cl
*** std::complex<_Ty> &' from 'class std::vector<double,class std::allocator<double> >'

2-error C2676: binary '*=' : 'class std::vector<double,class std::allocator<double> >' does not define this operator or a conversion to a type acceptable to the predefin
ed operator

3-error C2679: binary '=' : no operator defined which takes a right-hand operand of type 'double' (or there is no acceptable conversion)

Please post your code in [code][/code] forum bbcode tags.

Quote:

---

Originally Posted by jhendrix

what is that I have to define to use += or *=?

---

You would need to overload operator+= and operator*= respectively.

What is a Vector<double>? It looks like it should be some class defined by you, but the error messages hint that it is a std::vector<double> instead. You might want to post the smallest and simplest program that demonstrates the errors.

Yes, without code tags, the post is always UNCLEAR, it is advisable to always c.learify code snips with code tags to release eyes strain and more

All the best :)

-Kim Tu

Thanks to both of you, I've solved first two errors but the third is still appearing,

mContactNormals[it_Set->first] = ac_normal;
error C2679: binary '=' : no operator defined which takes a right-hand operand of type 'double'
thanks

Exactly as the error says. mContactNormals[it_Set->first] is not of the same type as ac_normal.