How to make a 2d vector in c++

// Create a vector containing n 
//vectors of size m, all u=initialized with 0
vector<vector<int> > vec( n , vector<int> (m, 0));

2d vector c++ declaration

vector< vector<int>> a(rows, vector<int> (cols));

Source: stackoverflow.com

Initialising 2d vector

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

Similar codes

0 vote91 views1 answer
Raspberry pi mount external hard drive
C++
14 votes97 views6 answers
How to get size of array c++
C++
0 vote95 views1 answer
Map::begin
C++
0 vote99 views1 answer
Recherche recursive le max dans une liste
C++
3 votes100 views3 answers
C++ class
C++
25 votes99 views5 answers
Sort vector in descending order c++
C++
0 vote103 views1 answer
Extra parameter in comparator function for sort
C++
0 vote105 views1 answer
ALO
C++
2 votes102 views1 answer
How to complie with c++ 17
C++
0 vote104 views1 answer
CoinPiles
C++