vector of vectors c++
#include <iostream>
#include <vector>
using namespace std;
int main()
{
vector<vector<int> > buff;
for(int i = 0; i < 10; i++)
{
vector<int> temp; // create an array, don't work directly on buff yet.
for(int j = 0; j < 10; j++)
temp.push_back(i);
buff.push_back(temp); // Store the array in the buffer
}
for(int i = 0; i < buff.size(); ++i)
{
for(int j = 0; j < buff[i].size(); ++j)
cout << buff[i][j];
cout << endl;
}
return 0;
}
4.5
3
int main()
{
int row = 5; // size of row
int colom[] = { 5, 3, 4, 2, 1 };
vector<vector<int> > vec(row); // Create a vector of vector with size equal to row.
for (int i = 0; i < row; i++) {
int col;
col = colom[i];
vec[i] = vector<int>(col); //Assigning the coloumn size of vector
for (int j = 0; j < col; j++)
vec[i][j] = j + 1;
}
for (int i = 0; i < row; i++) {
for (int j = 0; j < vec[i].size(); j++)
cout << vec[i][j] << " ";
cout << endl;
}
}
Thank you!
3
0
4.33
9
vector<vector<int>> matrix(x, vector<int>(y));
This creates x vectors of size y, filled with 0's.
Thank you!
9
0
4
2
#include <iostream>
#include <vector>
using namespace std;
int main()
{
int n = 5;
int m = 7;
//Create a vector containing n vectors of size m and initalize them to 0.
vector<vector<int>> vec(n, vector<int>(m, 0));
for (int i = 0; i < vec.size(); i++) //print them out
{
for (int j = 0; j < vec[i].size(); j++)
{
cout << vec[i][j] << " ";
}
cout << endl;
}
}
Thank you!
2
0
3.5
4
vector<vector<data_type>> vec;
Thank you!
4
0
0
0
#include <iostream>
#include <vector>
using namespace std;
int main() {
//vector element size
const int size = 4;
//vector with int data type
//all elements are equal to 4
vector<int> myVect (size, 4);
for (int i=0; i<size; i++) {
cout << "Vector index(" << i <<") is: "<< myVect[i] << endl;
}
return 0;
}
Thank you!
0
0
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