vector 2d code example
Example 1: how to make a 2d vector in c++
vector<vector<int> > vec( n , vector<int> (m, 0));
Example 2: 2d vector
#include <bits/stdc++.h>
using namespace std;
int main()
{
int rows = 2;
int cols = 2;
int val = 1;
vector< vector<int> > v(rows, vector<int> (cols, val));
v[0][0] = 5;
v[1][1] = 4;
cout << v[0][0] << endl;
Example 3: 2d vector
#include <bits/stdc++.h>
using namespace std;
main() {
int r=2,c=3,val=1;
vector<vector<int>> v(r,vector<int>(c,val));
for(int i=0;i<r;i++)
for(int j=0;j<c;j++)
cout<<v[i][j]<<" ";
cout<<endl;
}
Example 4: how to take input in 2d vector in c++
std::vector<vector<int>> d;
cout<<"Enter the N number of ship and port:"<<endl;
cin>>in;
cout<<"\Enter preference etc..:\n";
for(i=0; i<in; i++){
cout<<"ship"<<i+1<<":"<<' ';
for(j=0; j<in; j++){
cin>>temp;
d.push_back(temp);
}
}
Example 5: 2d vector
vector<vector<int>> v(row,vector<int>(col,val));