Theoretical introduction

Lesson 2: Operators, Types, and Variables

Objectives:

· Understand what a variable is.

· Familiarization with C# built-in types.

· Get an introduction to C# operators.

· Learn how to use Arrays.

Problem statement:

1. Calculate y, as a result of a given arithmetic equation.

2. Calculate z, as a result of a given logical equation.

3. Calculate s, as a result of a given string expression (text message).

Variants

Вариант № 1

1) Y= ;

2) Z=

Variant № 2

1) Y=

2) Z=

Variant № 3

1) Y=

2) Z=

Variant № 4

1) Y=

2) Z=

Variant № 5

1) Y=

2) Z=

Variant № 6

1) Y= ;

2) Z=

Variant № 7

1) Y=

2) Z=

Variant № 8

1) Y=

2) Z= ;

Variant № 9

1) Y=

2) Z=

Variant № 10

1) Y= ;

2) Z= ;

Variant № 11

1) Y= ;

2) Z=

Variant № 12

1) Y= ;

2) Z=

Variant № 13

1) Y= ;

2) Z=

Variant № 14

1) Y= ;

2) Z=

Variant № 15

1) Y= ;

2) Z=

Variant № 16

1) Y= ;

2) Z=

Variant № 17

1) Y= ;

2) Z=

Variant № 18

1) Y=

2) Z=

Variant № 19

1) Y= ;

2) Z=

Variant № 20

1) Y=

2) Z=

Variant № 21

1) Y= ;

2) Z=

Variant № 22

1) Y=

2) Z=

Variant № 23

1) Y=

2) Z= ;

Variant № 24

1) Y=

2) Z=

Variant № 25

1) Y= ;

2) Z= ;

Variant № 26

1) Y= ;

2) Z=

Variant № 27

1) Y= ;

2) Z=

Variant № 28

1) Y= ;

2) Z=

Variant № 29

1) Y= ;

2) Z=

Variant № 30

1) Y= ;

2) Z= ;

Example

1. Calculate value of the next expression:

if

2. Calculate if , where logic operator NOT, - logic multiplication AND, - logic addition OR.

3. Print out author’s full name, if first name – Ivan, and surname - Petrov.

STEP1

STEP2

STEP3

STEP4

using System;

using System.Collections.Generic;

using System.Text;

namespace Ivanov2

{

class Program

{

static void Main()

{

double

y,

x=3.5,

z=1e-5,

Denominator, Numerator,

X = 6.3, Y=5.1;

int

b=-4;

string FullName = "";

string FirstName = "Petr";

string Surname = "Ivanov";

bool

Z,

A = true,

B = false;

int

iFirstName

iSurname, iFullName;

Console.WriteLine(" ***** Initial data*****:\n");

Console.WriteLine(" x={0} z={1} b={2}", x, z, b);

Console.WriteLine(" X={0} Y={1}", X, Y);

Console.WriteLine(" A={0} B={1}", A, B);

Console.WriteLine(" Name={0}", FirstName);

Console.WriteLine(" Surname={0}", Surname);

Numerator=Math.Atan(z)*Math.Pow(z,1/3.0)*Math.PI/Math.Exp(x)+

Math.Pow(z,2)-4.5*Math.Pow(10.0,2.5)*Math.Sqrt(x)*Math.Asin(z);

Denominator = Math.Tan(2.7e-3) - Math.Acos(z) * Math.Log(x) +

Math.Pow(z, x) + Math.Abs(Math.Sin((double)b)) - Math.Log10(z);

y = Numerator / Denominator;

Z=!A && (X<=Y) || (X>0) && B;

iFirstName = FirstName.Length;

iSurname=Surname.Length;

FullName = FirstName + " " + Surname;

iFullName = FullName.Length;

Console.WriteLine("\n ***** Results *****:\n");

Console.WriteLine(" Arithmetic equation: y={0}", y);

Console.WriteLine(" Logical equation: Z={0}", Z); Console.WriteLine(" String type: FullName={0}", FullName);

Console.WriteLine(" Number of letters in the full name={0}", iFullName);

Console.WriteLine("Number of letters in the name ={0}", iFirstName);

Console.WriteLine("Number of letters in the surname={0}", iSurname);

}

}

}

STEP5

Theoretical introduction

Дата добавления: 2015-11-14