Move Constructors in C++ with Examples

Prerequisites: l-value and r-value references in C++Copy Constructor in C++.

What is a Move Constructor?

The copy constructors in C++ work with the l-value references and copy semantics(copy semantics means coping the actual data of the object to another object rather than making another object to point the already existing object in the heap). While move constructors work on the r-value references and move semantics(move semantics involves pointing to the already existing object in the memory).

On declaring the new object and assigning it with the r-value, firstly a temporary object is created, and then that temporary object is used to assign the values to the object. Due to this the copy constructor is called several times and increases the overhead and decreases the computational power of the code. To avoid this overhead and make the code more efficient we use move constructors.

Why Move Constructors are used?

Move constructor moves the resources in the heap, i.e., unlike copy constructors which copy the data of the existing object and assigning it to the new object move constructor just makes the pointer of the declared object to point to the data of temporary object and nulls out the pointer of the temporary objects. Thus, move constructor prevents unnecessarily copying data in the memory.

Work of move constructor looks a bit like default member-wise copy constructor but in this case, it nulls out the pointer of the temporary object preventing more than one object to point to same memory location.

#constructors #cpp-constructor #programming-c #cplusplus #c++

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Move Constructors in C++ with Examples

Move Constructors in C++ with Examples

Prerequisites: l-value and r-value references in C++Copy Constructor in C++.

What is a Move Constructor?

The copy constructors in C++ work with the l-value references and copy semantics(copy semantics means coping the actual data of the object to another object rather than making another object to point the already existing object in the heap). While move constructors work on the r-value references and move semantics(move semantics involves pointing to the already existing object in the memory).

On declaring the new object and assigning it with the r-value, firstly a temporary object is created, and then that temporary object is used to assign the values to the object. Due to this the copy constructor is called several times and increases the overhead and decreases the computational power of the code. To avoid this overhead and make the code more efficient we use move constructors.

Why Move Constructors are used?

Move constructor moves the resources in the heap, i.e., unlike copy constructors which copy the data of the existing object and assigning it to the new object move constructor just makes the pointer of the declared object to point to the data of temporary object and nulls out the pointer of the temporary objects. Thus, move constructor prevents unnecessarily copying data in the memory.

Work of move constructor looks a bit like default member-wise copy constructor but in this case, it nulls out the pointer of the temporary object preventing more than one object to point to same memory location.

#constructors #cpp-constructor #programming-c #cplusplus #c++

Generics type example in C# | Generic Class | Generic Method | C# Tutorial | Advanced C#

https://youtu.be/xfDjyg9jKSk

#oop in c# #object oriented programming in c# #object oriented concept in c# #learn oop concept #advance c# #generics type example in c#

Tamale  Moses

Tamale Moses

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How to Run C/C++ in Sublime Text?

C and C++ are the most powerful programming language in the world. Most of the super fast and complex libraries and algorithms are written in C or C++. Most powerful Kernel programs are also written in C. So, there is no way to skip it.

In programming competitions, most programmers prefer to write code in C or C++. Tourist is considered the worlds top programming contestant of all ages who write code in C++.

During programming competitions, programmers prefer to use a lightweight editor to focus on coding and algorithm designing. VimSublime Text, and Notepad++ are the most common editors for us. Apart from the competition, many software developers and professionals love to use Sublime Text just because of its flexibility.

I have discussed the steps we need to complete in this blog post before running a C/C++ code in Sublime Text. We will take the inputs from an input file and print outputs to an output file without using freopen file related functions in C/C++.

#cpp #c #c-programming #sublimetext #c++ #c/c++

Dicey Issues in C/C++

If you are familiar with C/C++then you must have come across some unusual things and if you haven’t, then you are about to. The below codes are checked twice before adding, so feel free to share this article with your friends. The following displays some of the issues:

  1. Using multiple variables in the print function
  2. Comparing Signed integer with unsigned integer
  3. Putting a semicolon at the end of the loop statement
  4. C preprocessor doesn’t need a semicolon
  5. Size of the string matters
  6. Macros and equations aren’t good friends
  7. Never compare Floating data type with double data type
  8. Arrays have a boundary
  9. Character constants are different from string literals
  10. Difference between single(=) and double(==) equal signs.

The below code generates no error since a print function can take any number of inputs but creates a mismatch with the variables. The print function is used to display characters, strings, integers, float, octal, and hexadecimal values onto the output screen. The format specifier is used to display the value of a variable.

  1. %d indicates Integer Format Specifier
  2. %f indicates Float Format Specifier
  3. %c indicates Character Format Specifier
  4. %s indicates String Format Specifier
  5. %u indicates Unsigned Integer Format Specifier
  6. %ld indicates Long Int Format Specifier

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A signed integer is a 32-bit datum that encodes an integer in the range [-2147483648 to 2147483647]. An unsigned integer is a 32-bit datum that encodes a non-negative integer in the range [0 to 4294967295]. The signed integer is represented in twos-complement notation. In the below code the signed integer will be converted to the maximum unsigned integer then compared with the unsigned integer.

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#problems-with-c #dicey-issues-in-c #c-programming #c++ #c #cplusplus

C++ Crash Course - Switch Statement Example In C++

In this C++ Crash Course video iam going to talk about C++ Switch Statement Example , so switch statement is used when we have multiple conditions and we need to perform different action based on the condition. For example if we have different conditions and we want to execute a block of code based on certain condition. In that case we need to use switch statement. Also you can use else if condition, but it is good idea if you have multiple conditions you can use switch statement.

Youtube channel: Parwiz Forogh - https://www.youtube.com/watch?v=aSbhRy59XlI

#c #c# #c++ #programming-c