gpetuhov

	int n = 0; // Number of elements in array
	int* arr;
	cout << "Enter number of elements in array" << endl;
	cin >> n;
	arr = new int[n];
	for (int i = 0; i < n; i++) {
		*(arr+i) = i;
		cout << *(arr+i) << " ";
	}
	cout << endl;

gpetuhov

// Arguments are passed by value.
// swap1 will swap x and y, not the variables that are passed into it.
void swap1(int x , int y) {
	int temp;
	temp = x;
	x = y;
	y = temp;
}

// swap2 takes pointers as arguments, so it will swap the initial variables

gpetuhov

// Argument is passed by reference, so the initial variable changes
int f(int &x) {
	// Static variable is created only once
	// and is not destroyed after function is finished.
	static int a = 0;
	if (!a) a = ++x; // !a is true only if a = 0
	return a;
}

int main() {

gpetuhov

// x1 is passed by value, initial variable doesn't change
// x2 is passed by reference, initial variable changes
int f1(int x1, int &x2) {
	return ++x1 + (++x2);
}

int main() {
	int x=39, *p = &x;
	cout << p << "  " << *p << endl;
	// Result is address of x and value of x (39)

gpetuhov

class A
{
	friend int Freund(); // function Freud() will have access to A's private fields
	friend class B; // class B will have access to A's private fields
	public : int x, y;
	private : short i;
} A1;

class B
{

gpetuhov

// file hello.cpp
#include <cstdlib>
#include <iostream>

using namespace std;

void HelloWorld() {
     cout << "Hello, world!" << endl;
}

gpetuhov

#include <iostream>

using namespace std;

int m = 5;
namespace space1
{
	int x1 = 3;
	namespace space2
	{

gpetuhov

short x = 4, i = 0;

void fun1()
{
	if (i == 5) throw 2;
}

void fun2()
{
	--x;

gpetuhov

    int x = 15;
    cout << hex << x << endl;

gpetuhov

    FILE* textFile;
    textFile = fopen("file.txt", "w");

    for (int i = 0; i < 10; i++) {
        fputs("1 ", textFile);
    }

    fclose(textFile);