#include <iostream>
#include <cstdlib>
#include <ctime>

void swapRef(int& a, int& b) {
	int t = a;
	a = b;
	b = t;
}

void swapPtr(int* a, int* b) {
	int t = *a;
	*a = *b;
	*b = t;
}

int main() {
	const int num = 10;
	int data[num];

	for (int i = 0; i < num; ++i) {
		data[i] = i + 1;
	}
/*	for (int i = 0; i < num; ++i) {
		std::cout << data[i] << '\n';
	}*/

	srand(time(0));
	for (int i = 0; i < num; ++i) {
		//data[i] = rand(); // [0 .. RAND_MAX)
		//data[i] = rand() % 100;
		data[i] = int(rand() / float(RAND_MAX)
					* 100);
	}
	for (int i = 0; i < num; ++i) {
		std::cout << data[i] << '\n';
	}
	std::cout << '\n';

//	swapRef(data[num-1], data[num-2]);
//	swapPtr(data[num-1], data[num-2]); // err!
//	int x = 3, y = 7;
//	swapPtr(&x, &y);
	swapPtr(&data[num-1], &data[num-2]);
	for (int i = 0; i < num; ++i) {
		std::cout << data[i] << '\n';
	}

	return 0;
}