Programmer in a trouble

Programmer in a trouble

Would you react like this crazy programmer in the following situation?

Turning programmer into a beast

As you know that the semi-colon is normally used to terminate a statement in the field of programming.A programmer tries not to miss semi-colon in his program otherwise his program would be full of errors.

 Do you want to turn a programmer into a beast?

Simply delete the semi-colon from his code and see the magic !!!!

Caution: Do not stay in his room after doing this otherwise he will kill you. :-)

Comparison between C++ and Haskell

Consider that you are a "Haskell" programmer and you have to write several lines of codes to simply print "Hello World". What would be your feelings?

So,as a  C++ programmer,you should be proud of your self as you only have to write cout<<"Hello World"; to print the same statement.

Programmer-a brave person

A programmer is very brave.He is always ready to face new hardships and challenges.So,respect a programmer !!!!!!

Comparison between C++ and Java

Now you should be a proud C++ programmer !!!!

Resource

This pic has been taken from groupinfo4u.com .

C++ vs Python

C++ programmers !!! Accept the reality :-)

Real programmer

Are you a real programmer????
See this image and decide !!!
(This image has been taken from www.sisodia.com)

Evolution of C

Have a look at the evolution of C#,lol !!!!!!

Evolution of C

Happiness of compiling the code successfully

What's your reaction?

Object Oriented Programming in C++ by Robert Lafore

Introduction

Object Oriented Programming in C++

Object-Oriented Programming in C++ begins with the basic principles of the C++ programming language and systematically introduces increasingly advanced topics while illustrating the OOP methodology. While the structure of this book is similar to that of the previous edition, each chapter reflects the latest ANSI C++ standard and the examples have been thoroughly revised to reflect current practices and standards.

 Author:

                  Robert Lafore

Date of publishing:

                                 December 29, 2001

Publisher:

                    

                                   Sams Publishing

Language:

                  English

Genre: 

    

            Programming

ISBN:

   

          

•                       ISBN-10: 0672323087
•                       ISBN-13: 978-0672323089

Rating:

             4.5/5 stars

Votes:

  

            54

Reviewer:

                David Horn

Review date:

                     January 30, 2004

Reviewer rating:

                            5/5 stars

Download link:

                    

                         Click here

Concept of pointers in C++

Pointers are an extremely powerful programming tool. They can make some things much easier, help improve your program's efficiency, and even allow you to handle unlimited amounts of data. For example, using pointers is one way to have a function modify a variable passed to it. It is also possible to use pointers to dynamically allocate memory, which means that you can write programs that can handle nearly unlimited amounts of data on the fly--you don't need to know, when you write the program, how much memory you need.      

Concept of pointers

Pointers are aptly named: they "point" to locations in memory. Think of a row of safety deposit boxes of various sizes at a local bank. Each safety deposit box will have a number associated with it so that the teller can quickly look it up. These numbers are like the memory addresses of variables. A pointer in the world of safety deposit boxes would simply be anything that stored the number of another safety deposit box. Perhaps you have a rich uncle who stored valuables in his safety deposit box, but decided to put the real location in another, smaller, safety deposit box that only stored a card with the number of the large box with the real jewelry. The safety deposit box with the card would be storing the location of another box; it would be equivalent to a pointer. In the computer, pointers are just variables that store memory addresses, usually the addresses of other variables. 

Declaration of pointers

The general form of a pointer variable declaration is:

type *var-name;

Here, type is the pointer's base type; it must be a valid C++ type and var-name is the name of the pointer variable. The asterisk you used to declare a pointer is the same asterisk that you use for multiplication. 

Reference

The reference of this blog is taken from

http://www.cprogramming.com/tutorial/lesson6.html

http://www.tutorialspoint.com/cplusplus/cpp_pointers.htmqq

       

Software engineer's life

And that is how the life of a software engineer goes on !!!

Matrix multiplication in C++

You have often learnt the method of matrix multiplication in Mathematics.

Matrix multiplication

Now,we will perform the same operations in C++ using the concept of 2-d arrays.So,below is the source code of the program.

Source code

#include<iostream>

#include<conio.h>

using namespace std;

void addition();

void subtraction();

void multiplication();

int mat1 [3][3], mat2[3][3],mat3[3][3], i ,j, k, sum,ab,ch;

int main()

{

int choice;

{

x:

cout<<"\t"<<"\t"<<"MAIN MENU"<<"\t"<<"\t"<<endl<<endl<<endl;

cout<<"Press 1 for 3*3 matrix multiplication."<<endl<<endl;

cout<<"Press 2 to exit from the program."<<endl<<endl;

cout<<"Enter your choice:";

cin>>choice;

switch(choice)

{

case 1:

multiplication();

break;

case 2:

return 0;

default:

cout<<"Invalid choice !!"<<endl<<endl;

}

goto x;

}

}

void multiplication()

{     

           cout<<"\nEnter values for first 3 x 3 matrix:\n";

           for ( i = 0 ; i <= 2 ; i++ )

                {

                   for (j = 0 ; j <= 2 ; j++ )

                        cin>>mat1 [i][j];

                }

                        cout<<"\n Enter values for second 3 x 3 matrix:\n";

                   for ( i = 0 ; i <= 2 ; i++ )

                        {

                            for ( j = 0 ; j <= 2 ; j++ )

                                   cin>>mat2[i][j];

                        }

                       cout<<"\n The first 3 x 3 matrix entered by you is:\n";

                            for ( i = 0 ; i <= 2 ; i++ )

                                 {

                                       for ( j = 0 ; j <= 2 ; j++ )

                                              cout<< mat1[i][j]<<"\t";

                                              cout<<endl<<endl;

                                 }

                                              cout<<"\n the second 3 x 3 matrix entered :\n";

                                       for ( i = 0 ; i <= 2 ; i++ )

                                            {

                                                for ( j = 0 ; j <= 2 ; j++ )

                                                       cout<< mat2[i][j]<<"\t" ;

                                                       cout<<endl<<endl;

                                            }

                                       for ( i = 0 ; i <= 2 ; i++ )

                                            {

                                                for ( j = 0 ; j <= 2 ; j++ )

                                                      {

                                                          sum = 0;

                                                            for ( k = 0 ; k <=2 ; k++ )

                                                                   sum = sum + mat1 [i][k] * mat2[k][j];

                                                                   mat3[i][j] = sum ; 

                                                       }

                                             }

                                                                   cout<<"\nThe product of the above two matrices is:\n";

                                                                   for ( i = 0 ;i<= 2 ; i++ )

                                                                        {

                                                                             for ( j = 0 ; j <= 2 ; j++ )

                                                                                      cout<<mat3[i][j]<<"\t";

                                                                                      cout<<endl<<endl;

                                                                         }

                                                                     }

Output

                                                                    

Matrix addition and subtraction in C++

You are well aware of the matrix addition and subtraction in Mathematics.

Matrix addition

Matrix subtraction

Now,we will perform the same operations in C++ using the concept of 2-d arrays.So,below is the source code of the program.

Source code

#include<iostream>

#include<conio.h>

using namespace std;

void addition();

void subtraction();

int mat1[2][2], mat2[2][2],mat3[2][2], i ,j, k, sum,ab,ch;

int main()

{

int choice;

{

x:

cout<<"\t"<<"\t"<<"MAIN MENU"<<"\t"<<"\t"<<endl<<endl<<endl;

cout<<"Press 1 for 2*2 matrix addition."<<endl<<endl;

cout<<"Press 2 for 2*2 matrix subtraction."<<endl<<endl;

cout<<"Press 3 to exit from the program."<<endl<<endl;

cout<<"Enter your choice:";

cin>>choice;

switch(choice)

{

case 1:

addition();

break;

case 2:

subtraction();

break;

case 3:

return 0;

default:

cout<<"Invalid choice !!"<<endl<<endl;

}

goto x;

}

}

void addition()

{

 cout<<"\nEnter values for first 2 x 2 matrix:\n";

           for ( i = 0 ; i <= 1 ; i++ )

                {

                   for (j = 0 ; j <= 1 ; j++ )

                        cin>>mat1 [i][j];

                }

                        cout<<"\n Enter values for second 2 x 2 matrix:\n";

                   for ( i = 0 ; i <= 1 ; i++ )

                        {

                            for ( j=0 ; j<=1 ; j++ )

                                   cin>>mat2[i][j];

                        }

                       cout<<"\n The first 2 x 2 matrix entered by you is:\n";

                            for ( i=0 ; i<=1 ; i++ )

                                 {

                                       for ( j=0 ; j<=1 ; j++ )

                                              cout<< mat1[i][j]<<"\t";

                                              cout<<endl<<endl;

                                 }

                                              cout<<"\n the second 2 x 2 matrix entered :\n";

                                       for ( i = 0 ; i <= 1 ; i++ )

                                            {

                                                for ( j = 0 ; j <= 1 ; j++ )

                                                       cout<< mat2[i][j]<<"\t";

                                                       cout<<endl<<endl;

                                            }

                                            for(i=0;i<=1;i++)

                                            {

                                            for(j=0;j<=1;j++)

                                            {

                                                                   mat3[i][j] = mat1[i][j] + mat2[i][j];

}

}

cout<<"The addition of matrices:"<<endl<<endl;

for(i=0;i<=1;i++)

{

for(j=0;j<=1;j++)

cout<<mat3[i][j]<<"\t";

cout<<endl<<endl;

}

}

void subtraction()

{

cout<<"\nEnter values for first 2 x 2 matrix:\n";

           for ( i = 0 ; i <= 1 ; i++ )

                {

                   for (j = 0 ; j <= 1 ; j++ )

                        cin>>mat1 [i][j];

                }

                        cout<<"\n Enter values for second 3 x 3 matrix:\n";

                   for ( i = 0 ; i <= 1 ; i++ )

                        {

                            for ( j = 0 ; j <= 1 ; j++ )

                                   cin>>mat2[i][j];

                        }

                       cout<<"\n The first 2 x 2 matrix entered by you is:\n"<<endl;

                            for ( i = 0 ; i <= 1 ; i++ )

                                 {

                                       for ( j = 0 ; j <= 1 ; j++ )

                                              cout<< mat1[i][j]<<"\t";

                                              cout<<endl<<endl;

                                 }

                                              cout<<"\n the second 2 x 2 matrix entered :\n"<<endl;

                                       for ( i = 0 ; i <= 1 ; i++ )

                                            {

                                                for ( j = 0 ; j <= 1 ; j++ )

                                                       cout<< mat2[i][j]<<"\t";

                                                       cout<<endl<<endl;

                                            }

                                            for(i=0;i<=1;i++)

                                            {

                                            for(j=0;j<=1;j++)

                                            mat3[i][j]=mat1[i][j]-mat2[i][j];

}

cout<<"The subtraction of matrices:"<<endl<<endl;

for(i=0;i<=1;i++)

{

for(j=0;j<=1;j++)

cout<<mat3[i][j]<<"\t";

cout<<endl<<endl;

}

}

Output

Progress in software industry

Lets have a look at the progress in software industry and see how software terminology has changed in the past few years.

Programming terminology

C++ The Complete Reference

Introduction

C++ The Complete Reference

Master programmer and best-selling author Herb Schildt has updated and expanded his classic reference to C++. Using expertly crafted explanations, insider tips, and hundreds of examples, Schildt explains and demonstrates every aspect of C++. Inside you'll find details on the entire C++ language, including its keywords, operators, preprocessor directives, and libraries. There is even a synopsis of the extended keywords used for .NET programming. Of course, everything is presented in the clear, crisp, uncompromising style that has made Herb Schildt the choice of millions. Whether you're a beginning programmer or a seasoned pro, the answers to all your C++ questions can be found in this lasting resource.

Detailed coverage includes:

• Data types and operators
• Control statements
• Functions
• Classes and objects
• Constructors and destructors
• Function and operator overloading
• Inheritance
• Virtual functions
• Namespaces
• Templates
• Exception handling
• The I/O library
• The Standard Template Library (STL)
• Containers, algorithms, and iterators
• Principles of object-oriented programming (OOP)
• Runtime type ID (RTTI)
• The preprocessor
• Much, much more

Author:

              Herbert Schildt

Date of publishing:

                                 November 19, 2002

Publisher:

                   McGraw-Hill Education

Language:

                   English

Genre:

              Programming

ISBN:

             

•                   ISBN-10: 0072226803
•                   ISBN-13: 978-0072226805

Rating:

             4.3/5.0 stars

Votes:

                  37

Reviewer:

                  A.Eassa

Review date:

                        April 18,2008

Reviewer rating:

                                         5/5 stars

Download link:

                                     Click here

Two-dimensional arrays in C++

Definition

In C++ Two Dimensional array in C++ is an array that consists of more than one rows and more than one column. In 2-D array each element is refer by two indexes. Elements stored in these Arrays in the form of matrices. The first index shows a row of the matrix and the second index shows the column of the matrix.

Syntax

data type name of array[no. of rows][no. of columns] 

For example,

int item[4][5];

Accessing each location

In order to store values in a C++ two dimensional arrays the programmer have to specified the number of row and the number of column of a matrix. To access each individual location of a matrix to store the values the user have to provide exact number of row and number of column.

Example:

int matrix[2][2];

matrix[0][0]=20;

matrix[0][1]=25;

matrix[1][0]=30;

matrix[1][1]=35;

Entering data

Nested loop is used to enter data in 2-D arrays. It depends upon the programmer which loop he wants to use it could be While loop or it could be a For loop. The outer loop acts as the number of rows of a matrix and the inner loop acts as the number of columns of a matrix.

Example:

#include<iostream.h> #include<conio.h> main() { int matrix [5] [5]; for (int m1=0 ; m1<5 ; m1++) { for (int m2=0 ; m2<5 ; m2++) { Matrix [m1] [m2] = 5 ; } } getch(); }                  Reference

The reference of this article has been taken from

http://www.hellgeeks.com/two-dimensional-arrays/

Arrays in C++

 Concept of arrays

One of the most important concepts in C++ is arrays.Today I will explain the concept of  arrays with daily life examples.For this article,I am taking help from the Android application "C++ little drops".

Suppose we want to calculate the average of the marks for a class of 20 students ,we certainly do not want to create 30 variables: std1,st2,std3,.......std.20.Instead,we can use a single variable,called an array with 30 elements.

Definition of arrays

An array is a list of elements of the same type(e.g., int), identified by a pair of square brackets [ ]. 

Declaration of arrays

To use an array, we need to declare the array with 3 things: a name, a type and a dimension( or size, or length).Remember that an array always starts with index 0.It means that the first value in an array is stored in index 0.The syntax is as follows:

Syntax

type arrayName[array length];

It is recommended to use a plural name for array.e.g., marks,numbers, books,etc.

int  books[10];

We can also initialize the array during declaration with a comma-separated list of values,as follows:

int numbers{2,4,5,6,3,9,12,14};

Example

A simple program will help you understand this concept more clearly.

Source code

#include<iostream>

#include<conio.h>

using namespace std;

main()

{

int numbers[5]={1,2,3,4,5};  //an array "numbers"

cout<<"The first number: "<<numbers[0]<<endl;  // number stored in index 0;

cout<<"The second number: "<<numbers[1]<<endl;

cout<<"The third number: "<<numbers[2]<<endl;

cout<<"The fourth number: "<<numbers[3]<<endl;

cout<<"The fifth number:"<<numbers[4]<<endl;

}

Output

The class of C++

Do you agree that C++ is better than C?

Class of C++

Why int can't swim?

This is the reason why this data type can't swim !!!