Solutions to previous assignments

These are possible solutions to a selected group of exercises found in the lab assignments prepared by Dr. Turner.

Lab 3, Exercise 6: Guess-the-Number Game


#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;

int main()
{
	int n, guess;

	srand(time(0));
	n = rand() % 1000 + 1;
	while (cin >> guess) {
		if (guess < n) {
			cout << "too small\n";
		} else if (guess > n) {
			cout << "too big\n";
		} else {
			cout << "you got it\n";
			return 0;	
		}
	}
}

Lab 3, Exercise 8: Detecting prime numbers


#include <iostream>
using namespace std;

bool is_prime(int x)
{
	for (int i = 2; i != x; ++i) {
		if (x % i == 0) return false;
	}
	return true;
}

int main()
{

	int n = 0;
	cout << "Enter an integer greater than 1: ";
	cin >> n;
	if (n <= 1) return 1;
	if (is_prime(n)) cout << "Prime\n";
	else cout << "Not prime\n";
}

Lab 4, Exercise 4: Random integer function


#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;

int randomInteger(int min, int max)
{
	return rand() % (max - min + 1) + min;
}

int main()
{
	int min = 0, max = 0;

	srand(time(0));
	cout << "Min: ";
	cin >> min;
	cout << "Max: ";
	cin >> max;
	cout << randomInteger(min, max) << endl;

}