CPP

how to create a vector in c++

// First include the vector library:
#include <vector>

// The syntax to create a vector looks like this:
std::vector<type> name;

// We can create & initialize "lol" vector with specific values:
std::vector<double> lol = {66.666, -420.69};

// it would look like this: 66.666 | -420.69

how to make a vector in c++

#include <iostream>
#include <vector>
 
using namespace std;
 
int main()
{
    vector<int> example(what ever size you want);
}

how to make a vector in c++

#include <vector>

using namespace std;

int main(){
  vector<int> v;
  //vector<type> name
  
  return 0;
}

create vectors of vectors c++

typedef std::vector<std::vector<double> > Matrix;

Matrix matrix = { {0.1,1.1,.2},
                 {.4,.5,.6}, 
                 {.8,.9,.10}
                };
// Just initilization:
int rows = 3;
int cols = 3;
Matrix m3(rows, std::vector<double>(cols) );