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how to make a 2d vector in c++

By Tanishq VyasTanishq Vyas on Jun 19, 2020 
// Create a vector containing n 
//vectors of size m, all u=initialized with 0
vector<vector<int> > vec( n , vector<int> (m, 0));

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5

size of a matrix using vector c++

By panda5panda5 on Jun 25, 2020 
// finding size of a square matrix
myVector[0].size();

Source: stackoverflow.com

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1

how to get size of 2d vector in c++

By Depressed DormouseDepressed Dormouse on Jun 27, 2020 
myVector[
  Vector[0, 4, 2, 5],
  Vector[1, 4, 2]
];

/*When you call for myVector[1].size() it would return 3 and [0] would return 4.

For the amount of rows (int vectors) in the 2d vector, you can just use myVector.size()

You can run this to see it in actions*/

Source: stackoverflow.com

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3

initialising 2d vector

By piratekshpirateksh on May 16, 2020 
// Initializing 2D vector "vect" with 
// values 
vector<vector<int> > vect{ { 1, 2, 3 }, 
                           { 4, 5, 6 }, 
                           { 7, 8, 9 } };

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5

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