#include <iostream>
#include <string>

using namespace std;

int main(int argc, char **argv) {
	int a = 3;

	++a;
	cout << "++a: " << a << endl;
	--a;
	cout << "--a: " << a << endl;

	a += 2;
	cout << "a += 2 : " << a << endl;
	a *= 3;
	cout << "a *= 3 : " << a << endl;
	a -= 4;
	cout << "a -= 4 : " << a << endl;
	a /= 5;
	cout << "a /= 5 : " << a << endl;
	return 0;
}