CODEWITHSUNDEEP
c++stl
ad1v7
ad1v7

Reputation: 327

Pass 2D vector of doubles to function as **double

It is possible to pass 1D vector to a function as follows:

#include <vector>

void f(double *vec) {
    // do stuff..
}

int main() {
   std::vector<double> vec = {1,2,3};
   f(&vec[0]);
}

Is there any equivalent for passing vector<vector<double>> to f(double **vec)?

I'm joining two pieces of code together and it would be cumbersome to rewrite whole code to use either vectors or arrays.

Upvotes: 2

Views: 474

Answers (1)

eerorika
eerorika

Reputation: 238461

No, you cannot pass a pointer to an element of std::vector<std::vector<double>> into a function accepting double** because the type of those elements is std::vector<double> and not double*. You would have to transform it into a std::vector<double*> to do the same.

Upvotes: 2

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