IvanNikolov

using System;

//Write a program that reads the radius r of a circle and prints its 
//perimeter and area formatted with 2 digits after the decimal point. 
//Examples:
//r 	perimeter	area
//2	      12.57	   12.57
//3.5	  21.99	   38.48

class CirclePerimeterAndArea

IvanNikolov

using System;
//A company has name, address, phone number, fax number, web site and manager. 
//The manager has first name, last name, age and a phone number. 
//Write a program that reads the information about a company 
//and its manager and prints it back on the console.

class PrintCompanyInformation
{
    static void Main()
    {

IvanNikolov

using System;

//Write a program that gets two numbers from the console and prints the greater of them. Try to implement this without if statements. Examples:
//a   b	 greater
//5	  6	   6
//10  5	  10

class NumberComparer
{
    static void Main()

IvanNikolov

using System;

//Write a program that reads 3 numbers: an integer a (0 ≤ a ≤ 500), 
//a floating-point b and a floating-point c and prints them in 4 virtual columns on the console.
//Each column should have a width of 10 characters. The number a should be printed in hexadecimal,
//left aligned; then the number a should be printed in binary form, padded with zeroes, 
//then the number b should be printed with 2 digits after the decimal point, right aligned; 
//the number c should be printed with 3 digits after the decimal point, left aligned. 
//Examples:
//a	       b	  c	                         result

IvanNikolov

using System;

//Write a C# program to print on screen the result of adding, subtracting, 
//multiplying and dividing two numbers typed by the user. 
//The remainder of the division must be displayed, too. 
//It might look like this: 
//Enter a number: 12 
//Enter another number: 3 
//12 + 3 = 15 
//12 - 3 = 9 

IvanNikolov

using System;
//Write a program that finds the biggest of three numbers.
//Examples:
//a	    b	    c	biggest
//5	    2	    2	    5
//-2	-2      1	    1
//-2	4	    3	    4

class BigestOf3Numbers
{

IvanNikolov

using System;
//Write a program that enters 3 real numbers and prints them
//sorted in descending order. Use nested if statements.
//Don’t use arrays and the built-in sorting functionality.
//Examples:
//a	    b	    c	    result
//5	    1	    2	    5 2 1
//-2	-2	    1	    1 -2 -2
//-2	4	    3	    4 3 -2

IvanNikolov

using System;

//Write an if-statement that takes two doubleeger variables a and b
//and exchanges their values if the first one is greater than the second one. As a result prdouble the values a and b, separated by a space. Examples:
//	b	result
//5	2	2 5
//3	4	3 4
//5.5	4.5	4.5 5.5
class ExchangeIfGreater
{

IvanNikolov

using System;
//Write a program that applies bonus score to given score in the range
//[1…9] by the following rules:
//•	If the score is between 1 and 3, the program multiplies it by 10.
//•	If the score is between 4 and 6, the program multiplies it by 100.
//•	If the score is between 7 and 9, the program multiplies it by 1000.
//•	If the score is 0 or more than 9, the program prints “invalid score”.
//Examples:
//score	result
//2	20

IvanNikolov

using System;
//Classical play cards use the following signs to designate the card face:
//2, 3, 4, 5, 6, 7, 8, 9, 10, J, Q, K and A. 
//Write a program that enters a string and prints “yes” 
//if it is a valid card sign or “no” otherwise. Examples:
//character	 Valid card sign?
//  5	        yes
//  1         	no
//  Q	        yes
//  q         	no