C#

Page 1

zadacha 5

class Program

{

static void Main()

{

int number = int.Parse(Console.ReadLine());

if (number < 100)

{

Console.WriteLine("Less than 100");

}

else if (number <= 200)

{

Console.WriteLine("Between 100 and 200");

}

else

{

Console.WriteLine("Greater than 200");

}

}

}

Page 2

zadacha 6

using System;

class Program

{

static void Main()

{

double speed = double.Parse(Console.ReadLine());

if (speed <= 10)

{

Console.WriteLine("slow");

}

else if (speed <= 50)

{

Console.WriteLine("average");

}

else if (speed <= 150)

{

Console.WriteLine("fast");

}

else if (speed <= 1000)

{

Console.WriteLine("ultra fast");

}

else

{

Console.WriteLine("extremely fast");

}

}

}

Page 3

zadacha 7

using System;

class Program

{

static void Main()

{

string figure = Console.ReadLine();

double area = 0;

if (figure == "square")

{

double a = double.Parse(Console.ReadLine());

area = a * a;

}

else if (figure == "rectangle")

{

double a = double.Parse(Console.ReadLine());

double b = double.Parse(Console.ReadLine());

area = a * b;

}

else if (figure == "circle")

{

double r = double.Parse(Console.ReadLine());

area = Math.PI * r * r;

}

else if (figure == "triangle")

{

double a = double.Parse(Console.ReadLine());

double h = double.Parse(Console.ReadLine());

area = (a * h) / 2;

}

Console.WriteLine($"{area:F3}");

}

}

Page 4

zadacha 8

using System;

class Program

{

static void Main()

{

int number = int.Parse(Console.ReadLine());

if (number < 0 || number > 100)

{

Console.WriteLine("invalid number");

return;

}

if (number == 100)

{

Console.WriteLine("one hundred");

return;

}

string[] ones =

{

"zero", "one", "two", "three", "four",

"five", "six", "seven", "eight", "nine",

"ten", "eleven", "twelve", "thirteen", "fourteen",

"fifteen", "sixteen", "seventeen", "eighteen", "nineteen"

};

string[] tens =

{

"", "", "twenty", "thirty", "forty",

"fifty", "sixty", "seventy", "eighty", "ninety"

};

if (number < 20)

{

Console.WriteLine(ones[number]);

}

else

{

int ten = number / 10;

int one = number % 10;

if (one == 0)

{

Console.WriteLine(tens[ten]);

}

else

{

Console.WriteLine($"{tens[ten]} {ones[one]}");

}

}

}

}