#include <iostream>
using namespace std;
int main() {
// Hello, world!
cout << "Hello World!";
cout << endl;
cout << "This is a C++ program.";
cout << endl << endl;
// Swapping values
int box1 = 3;
int box2 = 5;
int temp = 0;
cout << "Before: " << box1 << " " << box2 << endl;
temp = box1;
box1 = box2;
box2 = temp;
cout << "After: " << box1 << " " << box2 << endl;
cout << endl;
// Addition
int x = 3;
int y = 5;
int z = x + y;
cout << x << " + " << y << " = " << z << endl;
// Subtraction
int a = x - y;
cout << x << " - " << y << " = " << a << endl;
// Multiplication
int b = x * y;
cout << x << " * " << y << " = " << b << endl;
// Division
double i = 3.0;
double l = 5.0;
double c = i / l;
cout << i << " / " << l << " = " << c << endl;
// Modulus
int d = x % y;
cout << x << " % " << y << " = " << d << endl;
// Increment/decrement
int counter1 = 0;
cout << endl << "counter1: " << counter1 << endl;
cout << "counter1 (incremented, postfix): " << counter1++ << endl; // Postfix
cout << "counter1: " << counter1 << endl;
int counter2 = 0;
cout << endl << "counter2: " << counter2 << endl;
cout << "counter2 (incremented, prefix): " << ++counter2 << endl; // Prefix
cout << "counter2: " << counter2 << endl;
return 0;
}
