how to use int** in c++ code example

Example 1: c++ declare variable

std::string str = "text";	// stores a string
int    foo = 3;				// stores any integer
float  bar = 3.14;			// stores 32 bit number
double baz = 3.14159265;	// stores 64 bit number

Example 2: c++ initialize array

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