vectors in c 2b 2b

1
2vector<int> vec;
3//Creates an empty (size 0) vector
4 
5
6vector<int> vec(4);
7//Creates a vector with 4 elements.
8
9/*Each element is initialised to zero.
10If this were a vector of strings, each
11string would be empty. */
12
13vector<int> vec(4, 42);
14
15/*Creates a vector with 4 elements.
16Each element is initialised to 42. */
17
18
19vector<int> vec(4, 42);
20vector<int> vec2(vec);
21
22/*The second line creates a new vector, copying each element from the
23vec into vec2. */

1#include <iostream>
2#include <vector>
3using namespace std;
4
5int main() {
6  //vector element size
7  const int size = 4; 
8  //vector with int data type
9  //all elements are equal to 4
10  vector<int> myVect (size, 4);
11
12  for (int i=0; i<size; i++) {
13    cout << "Vector index(" << i <<") is: "<< myVect[i] << endl; 
14  }
15  return 0;
16}

1vector <int> vc;