Iterators and multidimensional vectors?
Tag : cpp , By : user183289
Date : March 29 2020, 07:55 AM
Any of those help vec_it>begin() dereferences vec_it, giving you a reference to the vector and then returns the result of calling begin() on that. You shouldn't dereference the result of that using * (doing so dereferences the iterator, yielding the element pointed at by that iterator, which is an int in this case; you want the iterator itself). Your inner for loop should look like:for(inner_it = vec_it>begin(); inner_it != vec_it>end(); ++inner_it)

How do I make multidimensional vectors?
Date : March 29 2020, 07:55 AM
I hope this helps . It's possible, but note that you need a space between the two >s to remove the ambiguity between the right shift operator, i.e. vector<vector<double> >
double matrix[10][10];

C++  How are multidimensional vectors stored?
Date : March 29 2020, 07:55 AM
it fixes the issue how much information (or which information) about the vector is stored in the address &A

How to Add two multidimensional std::vectors (without using operator+)?
Tag : cpp , By : user86493
Date : March 29 2020, 07:55 AM
I wish did fix the issue. The algorithm is simple and straightforward: , You must provide a version for Add() that works on basic data types // Handle basicdatatypes
template<class T>
T Add(const T& x1, const T& x2)
{
return x1 + x2;
}
// Specialisation for vectors
template<class T>
std::vector<T> Add(std::vector<T> const& v1, std::vector<T> const& v2)
{
assert(v1.size()==v2.size());
std::vector<T> result;
result.reserve(v1.size());
for(size_t i=0; i!=v1.size(); ++i)
result.emplace_back(Add(v1[i],v2[i])); // possibly recursive
return result;
}

multidimensional vectors and pointers to vectors
Tag : cpp , By : Igor Carron
Date : March 29 2020, 07:55 AM

