/// <task_description>
/// 5. Modify the previous program such that only multiples of three
/// or five are considered in the sum, e.g. 3, 5, 6, 9, 10, 12, 15 for n=17
/// <previous> 4. Write a program that asks the user for a number n and prints
/// the sum of the numbers 1 to n</previous>
/// </task_description>
public override void ExerciseRun()
{
long sum = 0;
int number = ServiceClass.InputPositiveIntegerNumber();
long RestrictedFactorial(int num)
{
if (num == 1)
{
return(0);
}
if (num % 3 == 0 || num % 5 == 0)
{
sum = num + RestrictedFactorial(num - 1);
}
else
{
sum = RestrictedFactorial(num - 1);
}
return(sum);
}
for (int i = number; i > 0; i--)
{
if (i % 3 == 0 || i % 5 == 0)
{
sum += i;
}
}
Console.WriteLine($"sum of numbers from 1 to {number}, such that only multiples of three or five = {RestrictedFactorial(number)}");
}
/// <task_description>
/// 6.Write a program that asks the user for a number n and gives them
/// the possibility to choose between computing the sum and computing
/// the product of 1,…,n.
/// </task_description>
public override void ExerciseRun()
{
var choiсe = AskSumOrProduct.Ask();
int number;
switch (choiсe)
{
case "s":
Console.WriteLine($"The sum of the numbers from 1 to {number = ServiceClass.InputPositiveIntegerNumber()} = {Sum(number)}");
break;
case "p":
Console.WriteLine($"The product of the numbers from 1 to {number = ServiceClass.InputPositiveIntegerNumber()} = {Product(number)}");
break;
case "e":
break;
default:
{
Console.WriteLine("Data you've inputted is incorrect. Let's try again.");
ExerciseRun();
}
break;
}
}
void StartGame()
{
for (int i = 0; i < 18; i++)
{
Console.Write("* ");
int delay = 500 - (i * 30) + 20;
if (delay < 0)
{
delay = 0;
}
System.Threading.Thread.Sleep(delay);
}
Console.WriteLine("\nI've just thought a number. What the number is?\n" +
"Input your guess and press \"Enter\"");
var rnd = new Random();
int thoughtNumber = rnd.Next(1, 100);
int guessNumber = (int)ServiceClass.InputPositiveIntegerNumber();
int previousGuessNumber;
int tryCounter = 1;
while (guessNumber != thoughtNumber)
{
previousGuessNumber = guessNumber;
if (guessNumber < thoughtNumber)
{
Console.WriteLine("Your number is TOO SMALL");
}
else
{
Console.WriteLine("Your number is TOO LARGE");
}
guessNumber = (int)ServiceClass.InputPositiveIntegerNumber();
if (previousGuessNumber != guessNumber)
{
tryCounter++;
}
}
Console.WriteLine("!!!CONGRATULATIONS, YOU WON!!!\n" +
$"The number is {thoughtNumber}. You've done it in {tryCounter} tries!\n\n");
System.Threading.Thread.Sleep(3000);
Console.WriteLine("Want to play one more time? >>> press SPACE-key\n" +
"For escape press any other key\n");
if (Console.ReadKey(true).KeyChar == ' ')
{
StartGame();
}
}
public override void ExerciseRun()
{
long sum = 0;
int number = ServiceClass.InputPositiveIntegerNumber();
for (int i = number; i > 0; i--)
{
sum += i;
}
Console.WriteLine($"sum of numbers from 1 to {number} (calculated by cycle) = {sum}");
long Factorial(int num)
{ // не могу понять почему не получается перехватить исключение на этой строке
try
{
if (num == 1)
{
return(1);
}
sum = num + Factorial(num - 1);
return(sum);
}
catch (StackOverflowException)
{
Console.WriteLine($"Recursive method of calculating of sum from 1 to {number} failed, supposedly becase of StackOverflow EXEPTION");
return(0);
}
}
try
{
Console.WriteLine($"sum of numbers from 1 to {number} (calculated by recursion) = {Factorial(number)}");
}
catch (StackOverflowException)
{
Console.WriteLine($"Recursive method of calculating of sum from 1 to {number} failed, supposedly becase of StackOverflow EXEPTION");
}
}