C# Exercises

Exercises

ICT Academy of Tamil Nadu

ELCOT Complex, 2-7 Developed Plots, Industrial Estate, Perungudi, Chennai 600 096.

Website : www.ictact.in , Email : [email protected] , Phone : 044 4290 6800 , Fax : 044 4290 6820

Table of Contents

1. Introduction to C# ............................................................................................................ 1

2. Identifiers, Variables, Data types Operators C# and Control Statements. .......................... 2

3. Introducing Classes, Objects, Methods and Namespaces. ................................................. 4

4. Inheritance, Polymorphism and Interface ......................................................................... 5

5. Operator Overloading ...................................................................................................... 6

6. Arrays, Index and Collections ........................................................................................... 7

7. Delegates and Events ....................................................................................................... 8

8. Strings and Regular Expressions ....................................................................................... 9

9. Generics ........................................................................................................................ 10

10. Reflection ...................................................................................................................... 11

11. Exception Handling ........................................................................................................ 12

12. Threading and Synchronization ...................................................................................... 13

C# Exercises

1

Topic - 1

Introduction to C#

1. Create a Console application named “Demo1” that produces the following outputs

Hello C#.

Goodbye C#.

2. Create a console application named “Demo2” to get name and age as input from the user

and display the same. The output of the program should be as below;

Enter your name : <name of user>

Enter your Age : <age>

Your name is <name of user> and age is <age>

3. Create a console application “Demo3” that produces the following output.

*

* *

***

Note: Each star should be printed separately.

4. Create a console application named “Demo4” that gets name from the user and displays

only the first character of the name.

Sample Output

Enter Your Name: ICTACT

Your Name starts with - I.

C# Exercises

2

Topic - 2

Identifiers, Variables, Data types Operators C# and Control Statements.

1. Create a console application named “Demo5” to get 5 numbers from user and sort the

number in ascending order. The output should be as below;

Enter No 1: 56

Enter No 2: 42

Enter No 3: 100

Enter No 4: 2

Enter No 5: 10

Ascending Sort: 2,10,42,56,100

2. Create a console application named “Demo6” to get 5 numbers as input and find the

smallest number among the 5 numbers.

3. Create a console application named “Demo7” to get two numbers as input from the

user and allow the user to choose the arithmetic operation be performed on the input

numbers. After entering the two numbers, the user should be asked to enter a number

from 1 to 6 to choose the arithmetic operation to be performed.

1. Addition

2. Subtraction

3. Division

4. Multiplication

5. Increment and

6. Decrement

C# Exercises

3

i.e. if the user enters 1 then addition should be performed , if the user enters 5 then

Increment should be done.

Note: Use switch-case control statement.

4. Create a console application named “Demo8” to get the name of the user as input and

print each characters in his name as output. (Use ForEach Statement)

Enter your Name: ICTACT

Output:

I

C

T

A

C

T

C# Exercises

4

Topic - 3

Introducing Classes, Objects, Methods and Namespaces.

1. Create a console application named “Demo9” that contains a class “DateDemo” which has a

method named “DiaplayDate” which when called displays the current date.

2. Create a console application named “Demo10” having a class called EmpDetails.

Add functionality such as storing and retrieving employee details such as employee id,

name, address, pin code, phone number, gross salary, and PF.

Display the net salary (that is gross less PF) and calculate the grade based on net salary.

The grades Details:

Grade = ‘A’ sal > 10000

Grade = ‘B’ sal > = 5000

3. Create a console application named “Demo11” to get a name as input from the user. If the

length of the name is greater than 5 print the name 10 times else print the name 5 times.

C# Exercises

5

Topic - 4

Inheritance, Polymorphism and Interface

1. Create a console application named “Demo12” that contains a base class that accepts

registration number and name of students. Write a program that will accept registration

number, name, and Branch as input. Implement two branch called CSE and ECE using

Inheritance. If the student enters CSE, then get the marks of computer Network, Data

Structure and Testing. If the student enters ECE, get the marks for Electronic Circuits, Circuit

Analysis and Analog Communication.

Then calculate the average of the three subjects.

The output should display the registration number, name, and the details of subject wise

marks and the average marks.

Hint: Student is the base class; ScienceStudent and CommerceStudent are inherited from it.

2. Create a console application named “Demo13” that has a base class called figure which

contains x, y, and name as member variable. x and y are double data type. Then create 4

derived classes named rectangle, triangle, square and cube which inherit from base class

figure. Then create a method named area in base class figure which should be overridden in

all derived class to calculate the area for each derived classes. Use constructors for all

classes to initialize data members. Data should be taken from user input.

3. Create a console application named “Demo14” that contains an Interface named “IShape”

which contains method called area. Create two classes cube and circle that implements the

interface. Calculate the area of cube and circle and print in the console window.

4. Create a console application named “Demo15” that contains two interface named “ICircle”

and “ICube”. Both the interfaces contain a method named “area”. Create a class named

“Shape” that implements both the interface. Calculate the area of cube and circle and print

in the console window.

C# Exercises

6

Topic - 5

Operator Overloading

1. Create a console application named “Demo16” that contains a class named “LoadOpt1”

that overloads “/” operator (Division) to perform multiplication operation

2. Create a console application named “Demo17” that contains a class named “LoadOpt2”

that contains three integer variables x,y and z and a method that overloads “-” operator to

calculate the difference between instance variable. Create two instance of LoadOpt2 and

find the difference between the instance variable using the overloaded operator method

and store the result in a instance of LoadOpt2. Print the result in console window.

C# Exercises

7

Topic - 6

Arrays, Index and Collections

1. Create a console application named “Demo18” that contains a class named “ArraySort”

that contains an integer array named MyArray of size 5. Get 5 numbers as inputs from user

and initialize the MyArray array. Perform a sort operation on MyArray and Print the result in

the console window.

2. Create a console application named “Demo19” that contains a class named “ArraySearch”.

This class contains an integer array named RollNumber of size 20. The elements of

RollNumber array are

{1002,2001,3005,4002,5005,6005,7005,7009,8009,13006,4588,5125,57896,3698,4587,784

1, 6524,5647,5823,4521}.

Perform a Binary Search on the RollNumber array to find the index of element 5125. Print

the output in a console window.

3. Create a console application named “Demo20” that contains a class named “EmpArrayList”

which contains the following members EmpID, Name and Age.

• Create 5 instance of EmpArrayList class and store each instance in an array list.

• Also allow the user to search the arraylist by entering EmpID and if the EmpID exist

in the arrylist then display Name and Age of the employee.

C# Exercises

Topic - 7

Delegates and Events

1. Create a console application named “

called strMyDel that takes one string parameter and returns a string. Create a class named

TestDelegate, that contains two Non

following signature:

string Space (string str);

string Reverse (string str);

Create another class named “

conversion.

Note:

Space() method will insert space between the input characters and Reverse() method

will reverse the input string


perform addition and multiplication on the input numbers. Use the concept of

Event to achieve the above mentioned output.


“MyForm” as an output of the console application. Also “

control in the middle of the form. When the button is clicked a message box should be

displayed.

Use the concept of Delegates and Events to achieve the above output.

application named “Demo21” to implement delegate. Create a delegate

that takes one string parameter and returns a string. Create a class named

, that contains two Non-static methods Space() and Reverse() having the

string Space (string str);

string Reverse (string str);

Create another class named “DemoDell” to Implement delegate Using Method group


reverse the input string

Create a console application named “Demo22” to get two integer numbers from user and

perform addition and multiplication on the input numbers. Use the concept of

to achieve the above mentioned output.

onsole application named “Demo23” that generates a windows form named

” as an output of the console application. Also “MyForm” should contain a Button


Use the concept of Delegates and Events to achieve the above output.

8

” to implement delegate. Create a delegate

that takes one string parameter and returns a string. Create a class named

static methods Space() and Reverse() having the

” to Implement delegate Using Method group


” to get two integer numbers from user and

perform addition and multiplication on the input numbers. Use the concept of MultiCast

” that generates a windows form named

” should contain a Button


C# Exercises

9

Topic - 8

Strings and Regular Expressions

1. Create a console application named “Demo24” to get employee name and age as input

from user. Employee name is of type String and Age is of type integer. Use the Concat()

method of string class to generate the following output:

Your Name is <Emp Name > and Age is <Emp_age>.

2. Create a console application named “Demo25” to get a string input from the user and

perform the following operation

• Check whether the input string contains any space and replace the space with “@”.

• Insert space between each character of the string

3. Create a console application named “Demo26” to get Mobile Number as input from user.

Validate the mobile number with the following cases

1. The first four number must be followed by “–“ then followed by next six numbers

(eg:9894-256874)

2. Should contain only numbers.

3. Should be of length 10.

4. The first number should start only with 9 or 8

C# Exercises

10

Topic - 9

Generics

1. Create a console application named “Demo27” that contains a class named “GenDemo”.

The “GenDemo” class should contain a non static generic method named “GenMethod”

which should accept any type of argument and cast arguments to string type and return the

same. Create a Class named “Demo” that calls the generic method (GenMethod) by passing

different type of arguments at each call and display the generated output in a console

window.

2. Create a console application named “Demo28” that contains a two type parameter generic

class named “GenCalss”. The “GenClass” also contains a generic virtual method “Add”

which accepts two generic parameters and generic return type.

Create two non generic class named “GenInt” and “GenString”.

The “GenInt” class should inherit “GenClass” using two integer type parameter and override

the Add method to perform arithmetic addition of the two integer parameters. The values

of the two integer parameter should be given by the user.

The “GenString” class should inherit “GenClass” using two string type parameter and

override the Add method to perform string concatenation of the two string parameters. The

values of the two string parameter should be given by the user.

3. Create a console application named “Demo29” that contains a singletone generic interface

named “GenInterface”. The “GenInterface” contains the following methods.

T Add(T arg1, T arg2);

T Subtract(T arg1, T arg2);

T Multiply(T arg1, T arg2);

T Divide(T arg1, T arg2);

Create a non generic class named “BasicMath” which implements the “GenInterface” using

integer type parameter. Also provide the implementation of the above four methods in the

“BasicMath” class and display the output of each method in the console window.

C# Exercises

11

Topic - 10

Reflection

1. Create a console application named “Demo30” that contains two classes namely “MyClass”

and “MyRefClass”. “MyClass” contains the following two methods.

public void set(int a, int b)

{

Console.Write("Inside set(int, int). ");

}

public void set(double a, double b)

{

Console.Write("Inside set(double, double). ");

}

Invoke the above two methods from “MyRefClass” by using Reflection.

2. Create a console application named “Demo31” which uses the assembly (Demo30.exe)

generated in the previous Topic. Using reflection find the following details about the

assembly

• Type info

• Constructor info

• Method info and

• Parameter info

C# Exercises

12

Topic - 11

Exception Handling

1. Create a console application named “Demo32” that handles the “IndexoutofRange”

exception when the user either tries to read or assign value to an array index greater than

the size of array.

2. Create a console application named “Demo33” the receives the following information from

the user;

Name (string), Age (integer), Salary (double) and Gender (Char).

If the user enters an age less than 18 and greater than 50, then throw a user defined

exception and display the message as “Registration Failed. Enter age greater than 18 and

less than 50”.

If the user enters an age between 18 and 50, then allow the user to enter other information

(Salary and Gender) and display a message as “Registration Successful”.

C# Exercises

13

Topic - 12

Threading and Synchronization

1. Create a console application named “Demo33” that displays current date a time for 10

times with the time interval of 2 seconds. (Hint: Use Sleep() method)

2. Create a console application named “Demo34” that contains class named “MyClass”. The

class contains a method called “Run()” which displays the name of the invoking thread for 5

times with a time gap of 2 seconds.

Create a class named”ThreadDemo” that invokes the Run() method using three child

thread. All child thread should invoke the Run () method at the same time.

3. Create a console application named “Demo35” that contains class named “MyClass”. The

class contains a method called “Run()” which displays the name of the invoking thread for 5

times with a time gap of 2 seconds.

Create a class named ”ThreadDemo” that invokes the Run() method using three child

thread. Only one child thread should access the Run () method.

Hint: use Lock ()

C# Exercises

Documents

Transcript of C# Exercises