C++ and C# are compared, with key differences noted such as C++ compiling to machine code while C# compiles to CLR. An algorithm to calculate rectangle area is presented, with programs in C++ and C# provided as examples. The conclusion states that C# is better than C++ in performance, usability and durability due to features like automatic memory management that C# has which C++ lacks.

1. Comparison of C++ and C#
Prepared by
Sudip Vora

2. Topics
• Difference between C# and C++.
• Which is better in performance?
• Explain with an algorithm, program and prove
it.

3. Contents
• Introduction
• Difference between C++ and C#
• Example of C++
• Example of C#
• Algorithm and Program of C++
• Algorithm and Program of C#
• Conclusion

4. Introduction
• C++ is an object – Oriented programming language. It was
developed by Bjarne Stroustrup at AT & T Bell
Laboratories in Murray Hill, New Jersey, USA, I the early
of 1980s. Stroustrup, an admirer of simula67 and strong
supporter of C, wanted to combine the best of both the
languages and create a more powerful language that could
support object-oriented programming features and still retain
the power and elegance of C. The result was C++.
• Therefore, C++ is an extension of C with a major addition of
the class construct feature of simula67. Since the class was a
major addition to the original C language Stroustrup initially
called the new language ‘C with classes’. However, later in
1983, the name was changed to C++. The idea of C++ comes
from the C Increment operator ++, thereby suggesting that
C++ is an augmented – incremented version of C.

5. Introduction(Contd.)
• C# (pronounced see sharp) is a multi-paradigm
programming language encompassing strong
typing, imperative, declarative, functional,
generic, object-oriented (class-based), and
component-oriented programming disciplines. It
was developed by Microsoft within its .NET
initiative.
• The name "C sharp" was inspired by musical
notation where a sharp indicates that the written
note should be made a semitone higher in pitch.

6. Principles of C++ development
• It should be "simple, object-oriented
and familiar"
• It should be "robust and secure"
• It should be "architecture-neutral and
portable"
• It should execute with "high
performance"
• It should be "interpreted and dynamic "

7. Principles of C# development
• It should be simple, modern, general-purpose, object-oriented
programming language.
• The language, and implementations should provide support for
software engineering principles
• The language is intended for use in developing software
components suitable for deployment in distributed
environments.
• C# is intended to be suitable for writing applications for both
hosted and embedded systems, ranging from the very large
that use sophisticated operating systems, down to the very
small having dedicated functions.
• Robustness, durability and programmer productivity are
important.

8. Difference between C++ & C#
C++ C#
C++ compiles down to machine code. C# 'compiles' down to CLR, which ASP.NET
interprets (roughly) Edit - As pointed out
in comments, it JIT compiles, not
interprets.
In C++, you must handle memory
manually.
Because C# runs in a virtual machine,
memory management is handled
automatically.
C++ support the multiple inheritance (of
implementation).
C# does not (although it does have
multiple inheritance of interface).
C++ includes a very powerful—and more
complex and difficult to master—
template meta language.
C# originally had nothing like it, with
many people believing that the common
type hierarchy obviated the need for
such techniques.
In C++ you have to do your own memory
management.
C# has a garbage collector.

9. Difference between C++ & C#(Contd.)
C++ C#
Pointers can be used anywhere in C++. In C# pointers are used only in unsafe
mode.
Default access Specifier is Public in C++. Default access Specifier is Private in
C#.net.
C++ is OOPS based. C# is Component & OOPS Based.
C++ is a language that runs on all sorts of
platforms, being extremely popular on
Unix and Unix-like systems.
C#, while standardized, is rarely seen
outside Windows.
C++ can create stand alone applications C# cannot.
C++ can create only console applications. C# can create console applications,
Windows applications, and ASP.NET
Websites,Mobile Applications,etc.

10. Example of C++
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
cout<<"n HELLO WORLD";
getch();
}

11. Example of C#
using System;
class Program
{
static void Main()
{
Console.WriteLine("Hello world!");
}
}

12. Algorithm to calculate Area of a Rectangle
Steps Description
1 Start
2 Ask the user for length and width of side
3 Store the value in box Length and Width
4 Calculate the area of the square (Length x Width)
5 Store the area in box Area
6 Print the value in box Area, appropriately labeled
7 Stop

13. Program of the above algorithm in C++
// Demonstration of variables
#include <iostream.h>
int main()
{
unsigned short int Width = 5, Length;
Length = 10;
// create an unsigned short and initialize with result
// of multiplying Width by Length
unsigned short int Area = Width * Length;
cout << "Width:" << Width << "n";
cout << "Length: " << Length << endl;
cout << "Area: " << Area << endl;
return 0;
}

14. Algorithm to calculate Area of a Rectangle
Steps Description
1 Start
2 Ask the user for length and width of side
3 Store the value in box Length and Width
4 Calculate the area of the square (Length x Width)
5 Store the area in box Area
6 Print the value in box Area, appropriately labeled
7 Stop

15. Program of the above algorithm in C#
using System;
class Program
{
static void Main(string[] args)
{
double Length;
double Area;
Console.WriteLine("Enter the length of a side of
Square :");
Length = Convert.ToDouble(Console.ReadLine());
Area = Length * Length;
Console.WriteLine("The area of Square is: " + Area);
Console.ReadLine();
}
}

16. Conclusion
• After going through various aspects of both, C++ and C#, we
came to a point that we claim that C# is better than C++. C#
has the features which C++ hadn’t.
• C# has many features that overcome the features of C++
which are not at all present in C++. Hence, we conclude with
C# is better than C++ in performance, usability and durability.