Initialize a 2D vector called matrix.
std::vector<std::vector<int>> matrix(512,std::vector<int>(512));
Now I want to resize it:
This works:
matrix.resize(50);
for(int i = 0; i<matrix.size() ; i++)
matrix[i].resize(50);
And this does not work:
matrix.resize(50);
for(auto ele : matrix)
ele.resize(50);
I am using for(auto ele : container)
in other places, I should have support for C++11, using Microsoft Visual C++ Compiler 12.0.
You are making copies of the inner vectors in each loop iteration. You need to use a reference:
for(auto& ele : matrix)
ele.resize(50);
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