Check out example codes for "arrays in C++". It will help you in understanding the concepts better.

Code Example 1

#include <iostream>
#include <array> //for using std::array

int main()
{

	int example[5];//array on stack
	int* another = new int[5];//array on heap
	delete[] another;//freeing up memory on heap
	example[0] = 1;
	example[1] = 2;
	example[2] = 3;
	example[3] = 4;
	for (int i = 0; i < 5; i++) {
		example[i] = 2;
	}
	int* ptr = example;//arrays are just pointers to the begining of the block of memory
	example[2] = 5;
	*(ptr + 2) = 6;//adding 4+4 bytes to ptr
	std::cout << example[2] << std::endl;//output => 6
	*(int*)((char*)ptr + 8) = 8;//adding 8 bytes to ptr using ptr arithmetic
	std::cout << example[2] << std::endl;//output => 8
	//std::array provide some additional functionality like bounce checking size checking but do have a performance overhead
	std::array<int,5> stda;//creating an array named stda of int 5 size
	std::cout << stda.size() << std::endl;//will output size of std::array ,output =>5   
    std::cin.get();
}

Code Example 2

string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"};

Code Example 3

int foo [] = { 16, 2, 77, 40, 12071 };

Code Example 4

int baz [5] = { };

Code Example 5

int myArray[] {2, 4, 6, 8, 10};
// scrittura
myArray[3] = 123; // {2, 4, 6, 123, 10};
// lettura
int a = myArray[2]; // a = 6;

Code Example 6

int leng = 10;
double X[leng];

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