What are other ways to declare an integer array named "a"?

int[] a = new int[5]; //5 is size of array

int[] a = {1,2,3,4,5};

theres two types of array,Single Dimension and Multi .

if single dimension :

int a[] = {10,13,24} ;

the braces there means that it is an array.you will use that as index to acess it.

Using a vector: http://en.cppreference.com/w/cpp/container/vector

    #include <vector>

    int main() {

        std::vector<int> a;

    }