c++ create vector size to put variable code example
Example 1: vectors c++ set the size
#include <iostream>
#include <vector>
using namespace std;
int main(void) {
vector<int> v;
cout << "Initial vector size = " << v.size() << endl;
v.resize(5, 10);
cout << "Vector size after resize = " << v.size() << endl;
cout << "Vector contains following elements" << endl;
for (int i = 0; i < v.size(); ++i)
cout << v[i] << endl;
return 0;
}
Example 2: declare vector of size n in c++
#include <vector>
auto n = 20
std::vector<int> arr(n);