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C++ vs Common Lisp: What are the differences?

Introduction

In this article, we will explore the key differences between C++ and Common Lisp. While both are powerful programming languages, they have distinct characteristics that set them apart. Let us delve into the details of these differences.

  1. Syntax and Semantics: C++ is a statically typed language with a syntax heavily influenced by the C programming language. It uses curly braces for code blocks and has a procedural programming paradigm. On the other hand, Common Lisp is a dynamically typed language that follows a prefix notation syntax called S-expression. It is a multiparadigm language, supporting functional programming, procedural programming, and object-oriented programming.

  2. Memory Management: C++ provides manual memory management through explicit allocation and deallocation of memory using operators such as new and delete. This gives the programmer fine-grained control over memory allocation. In contrast, Common Lisp has automatic memory management, using a technique known as garbage collection. The system tracks which objects are in use and automatically reclaims memory that is no longer accessible.

  3. Object-Oriented Programming: C++ has built-in support for object-oriented programming (OOP) with features like classes, inheritance, and polymorphism. OOP is one of the primary programming paradigms in C++. On the other hand, Common Lisp supports OOP through the Common Lisp Object System (CLOS), which provides advanced features such as multiple inheritance, method combinations, and runtime redefinition of classes.

  4. Standard Libraries: C++ has a rich set of libraries in its Standard Template Library (STL), which provides various data structures and algorithms. Additionally, C++ has a vast ecosystem of third-party libraries for various purposes. Common Lisp also has a standard library with a wide range of functionality, including support for networking, file system operations, and database access. However, Common Lisp's library ecosystem may not be as extensive as that of C++.

  5. Compilation and Interpretation: C++ code is typically compiled into machine code before execution. This compilation step ensures high performance but requires an extra build step and may slow down the development cycle. Common Lisp, on the other hand, is often interpreted, which means that the code is executed directly by an interpreter without prior compilation. This allows for rapid development and interactive experimentation but may result in slower execution speed compared to compiled languages.

  6. Metaprogramming and Macros: C++ does not have a built-in metaprogramming facility, although techniques like template metaprogramming can be used to achieve similar effects. Common Lisp, on the other hand, has powerful metaprogramming capabilities, thanks to its macro system. Macros allow the programmer to define new language constructs and extend the language's syntax, enabling advanced compile-time transformations and code generation.

In summary, C++ and Common Lisp differ in their syntax, memory management, support for object-oriented programming, availability of standard libraries, compilation/interpretation approach, and metaprogramming capabilities. These differences make each language better suited for different types of projects and programming styles.

Advice on Common Lisp and C++
Needs advice
on
AngularJSAngularJSC++C++
and
JavaJava

I will use Elixir for personal projects. It's productive, reliable, secure, simple, etc. But when performance is critical, I need job opportunities, when I work with mutability, which do I pick? I need advice on which "bureaucratic, mainstream" programming language to pick when wanting performance and jobs. Elixir is often "slow", and it hasn't boomed yet the way Golang and Rust have, so which?

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Replies (1)
FREDRICK OLUOCH
Lead Software Developer at Blaqueyard · | 3 upvotes · 56K views
Recommends
on
ElixirElixirRustRust
at

Well for those performant tasks maybe you can use Rust nifs for elixir. Elixir enables to write fault-tolerant, scalable code for concurrent systems, and as such, it is perfect for messaging systems and web applications that might need to handle a lot of users efficiently. But if you need speed you can plug in Rust or write a microservice using Goland/Rust.

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Youcef Benamare
Needs advice
on
C langC langC++C++
and
C#C#

include include int main(){ char name[10], pasword[10]; printf("enter you user name :"); gets(name); printf("enter your pasword : "); gets(pasword); printf("your name : %s \n your password : %s \n", name, pasword); if ( name != "youcef") { printf("name undefined\n"); } else { printf("finde name"); }

}

his not working

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Replies (2)
Richard Rios
Senior Software Engineer · | 5 upvotes · 137.5K views
Recommends
on
C langC lang

You will want to do a few things here. First, replace gets with fgets. Then, you're going to want to use strcmp from string.h to compare the input with the desired result. The code listed below has been updated with a working example with the previously mentioned recommendations. This isn't perfect and there are other ways to accomplish the same task. Explore other options that are available when you have a chance and see if you can improve on this example.

#include <stdio.h>
#include <string.h>

int main()
{ 
    char name[10], 
    pasword[10]; 

    printf("enter you user name :"); 

    // Use fgets as gets is insecure and can easily lead to buffer overflow exploits
    fgets(name, sizeof(char) * sizeof(name), stdin);

    // Remove \n from fgets stdin read with null character so as to not have to include
    // in strcmp later.
    name[strlen(name) - 1] = '\0';

    printf("enter your pasword : "); 
    fgets(pasword, sizeof(char) * sizeof(pasword), stdin);

    printf("your name : %s \n your password : %s \n", name, pasword);

    // If strcmp result > 0 || < 0 it's not a match
    if (strcmp(name, "youcef") != 0) 
    { 
        printf("name undefined\n"); 
    } 
    else 
    { 
        printf("finde name"); 
    }
}
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Recommends
on
C langC lang

Dear, Yusuf You can't use if statement to compare two strings, but you can use strcmp() function which means string compare The behavior of strcmp function is: If (string1 < string2)? Then: return a negative value. If (string1 > string2)? Then: return a positive value.

If(string1 == string2)? Then: return (0).

So, you can modify this statment to: if(strcmp(name,"Yousef") != 0) printf("name undefined\n");

else printf("find name");

But, In this case there is one logic problem that (strcmp) function don't ignore the letter case. For example: If you input name : yousef

The first letter here (y) is small, but in the comparing statement above is capital, So the result will be "name undefined", but in fact "yousef" = "Yousef".

To solve this problem you should use stracasecmp() function. This function ignore the letter case while comparing. The code will be: if(strcasecmp(name,"Yousef") != 0) printf("name undefined\n");

else printf("find name");

Attention: Include string libreary after using these functions to skip any problem may be found.

include

may Allah bless you ^_^

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Needs advice
on
C++C++JavaScriptJavaScript
and
PythonPython

Hello, I am interested in learning how to program. I am a beginner, and many articles saying I should go with Python if I am new to programming. I considered Lua a long time ago, but for my career, I believe major programming languages should be better for me. I'm considering Python at this moment, but if you have other tools I should use, let me know.

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Replies (3)
Pat Fitzner
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on
PythonPython

Although Lua is a very simple,efficient, elegant and welcoming language, Python is extremely versatile. Therefore, if you want to get into programming without a defined direction, Python is the way to go. It has a lot of libraries, the ability to do anything and it is closer to other languages than Lua is (yeah I know about Lua and C, but from a learner's point of view, it makes sense). Additionally, Python will be a marketable skill, but I for one have not yet seen job offers for Lua devs.

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Recommends
on
C langC langC++C++C#C#JavaJava

The language you choose is also dependant on the type of career / area of programming you wish to focus on: Web Based and mobile applicaitons I would lean towards Java, PC Applications I tend to like C#, Embedded industry C, C++

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anas mattar
Technical Lead at DPO International · | 2 upvotes · 198.5K views
Recommends

my advice , you should answer me for this question, what do you like to work: web base or mobile native or cross platform. if you like web base you should choose PHP or ASP.net or Node.js or if you like mobile native you should decide Android or IOS platform and else if you like cross platfrom you should learn Flutter with dart language. thanks

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Needs advice
on
C++C++JavaScriptJavaScript
and
PythonPython

Hi, I'm just starting to learn code, and I stumbled upon this website. I think I should learn JavaScript, Python, and C++ to begin with. I'm a quick learner so I am only worried about what would be more useful. Suppose my goal is to build an online clothing store or something. Then what languages would be best? I need advice. Please help me out. I'm 13 and just beginning and it's hard to understand when people use technical terms so please keep it simple. Thanks a lot.

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Replies (8)
Taimoor Mirza
Associate Software Engineer at Intech Process Automation · | 21 upvotes · 231.1K views
Recommends
on
PythonPython

Go with Python. It's syntax is really simple and less verbose compare to others. You can use Python for basically anything like web dev, task automation, data science, data engineering, cybersecurity etc. At initial level, it's more important to get an understanding of programming fundamentals. Once you get conformable with coding in general, then you can explore other languages.

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I would worry less about languages when you're first starting out. If you want to build an online store, then javascript is a great language that is used all over the web! Get comfortable with your first language, learn some computer science concepts and how to build things the right way, and then just work towards a goal and learn as you go!

https://www.w3schools.com/ is a great resource and it's completely free, everything you need to know to build a website is on that page if you have the drive to learn it. Best of luck to you!

Here's a neat roadmap too, in case you find yourself lost on what to learn next https://roadmap.sh/frontend

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Recommends
on
JavaScriptJavaScript

I recommend JavaScript to build your first website, for both FrontEnd and BackEnd , even tho I am a BIG fan of C++ it is not well suited yet to create websites, and Python would be just as good for the BackEnd as JavaScript but having everything written in only one language will make your learning curve way easier, so it is easy to recommend JavaScript.

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Mukesh Gurpude
Recommends
on
JavaScriptJavaScriptPythonPython

Python is an easy and beginner-friendly language. As you've mentioned about Online Clothing store, you'll need to deal with the website part and you'll need Javascript to make the site accessible and functional. Javascript will be more easy to learn if you learn Python first, so you can just start with Python.

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Recommends
on
JavaScriptJavaScript

I have worked with all these a ton. I make ecommerce and enterprise apps now. The only one of these you need is JavaScript. You can use JS on the backend as Node.js in AWS Lambda. You will need HTML and CSS skills, as well as a database. I recommend MongoDB. Please forget about C++ until you built your first company. Python fits the same purpose as Node.js but is currently popular in the Data Science community so skip it until you have a LOT of customers.

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Recommends
on
FlaskFlaskPythonPython

Hello Rachel, as a fellow programmer, I am glad that you are planning on expanding your coding knowledge and skills.

I recommend learning python first as it has a very simple syntax (syntax is how your code looks and how simple it is to type) and is also very user-friendly. Once you get to know how to code in python, you can use this thing called Flask.

Flask is what you call a "web application framework" or a WAF, it basically is a tool used to develop websites and other similar things. You don't have to worry much about it's difficulty because it is based on python. You will still have to learn how to use Flask though as it could be a bit complicating in first glance.

If you are looking for simpler ways for making website without having to learn a lot of programming, you can learn HTML and CSS. These 2 will help you in making a basic and functional website. The catch is, from a career perspective, HTML won't get you far, as literally every programmer knows it. So it is best to use programming languages.

I hope this gave you a clear understanding of the ways in which you can build websites. Wishing you the best of luck!

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John Akhilomen
Recommends
on
JavaScriptJavaScriptPythonPython

Since you're new, I'd recommend Javascript and Python. With Javascript, just learn React and Node. And with Python, learn Django. With JavaScript, Node, React, Python, and Django; you can accomplish quite a lot for both frontend and backend.

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Recommends
on
WordPressWordPress

Hi, When saying that "Suppose my goal is to build an online clothing store or something", I would go for a ready to use platform like Wordpress. it will give you a fast jump into the online world. By using WP you'll have to catch on with PHP\JQuery Goodluck.. Ping me when store is ready, I might buy something....

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Decisions about Common Lisp and C++
Alexandre Desroches
Founder & Developper at Finance D · | 71 upvotes · 344.5K views

I had a goal to create the simplest accounting software for Mac and Windows to help small businesses in Canada.

This led me to a long 2 years of exploration of the best language that could provide these features:

  • Great overall productivity
  • International wide-spread usage for long-term sustainability and easy to find documentation
  • Versatility for creating websites and desktop softwares
  • Enjoyable developper experience
  • Ability to create good looking modern UIs
  • Job openings with this language

I tried Python, Java, C# and C++ without finding what I was looking for.

When I discovered Javascript, I really knew it was the right language to use. Thinking of this today makes me realize even more how great a decision this has been to learn, use and master Javascript. It has been a fun, challenging and productive road on which I am still satisfied.

Obviously, when I refer to Javascript, it is not without implying the vast ecosystem around it. For me, JS is a whole universe in which almost every imaginable tools exist. It's awesome - for real. Thanks to all the contributors which have made it possible.

To be even clearer about how intense I am with Javascript, let's just say that my first passion was music. Until, I find coding with Javascript! Yep, I know!

So in conclusion, I chose Javascript because it is versatile, enjoyable, widely used, productive for both desktop softwares and websites with ability to create modern great looking user interfaces (assuming HTML and CSS are involved) and finally there are job openings.

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Python has become the most popular language for machine learning right now since almost all machine learning tools provide service for this language, and it is really to use since it has many build-in objects like Hashtable. In C, you need to implement everything by yourself.

C++ is one of the most popular programming languages in graphics. It has many fancy libraries like eigen to help us process matrix. I have many previous projects about graphics based on C++ and this time, we also need to deal with graphics since we need to analyze movements of the human body. C++ has much more advantages than Java. C++ uses only compiler, whereas Java uses compiler and interpreter in both. C++ supports both operator overloading and method overloading whereas Java only supports method overloading. C++ supports manual object management with the help of new and delete keywords whereas Java has built-in automatic garbage collection.

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Russtopia Labs
Sr. Doodad Imagineer at Russtopia Labs · | 0 upvote · 199.8K views

As a personal research project I wanted to add post-quantum crypto KEM (key encapsulation) algorithms and new symmetric crypto session algorithms to openssh. I found the openssh code and its channel/context management extremely complex.

Concurrently, I was learning Go. It occurred to me that Go's excellent standard library, including crypto libraries, plus its much safer memory model and string/buffer handling would be better suited to a secure remote shell solution. So I started from scratch, writing a clean-room Go-based solution, without regard for ssh compatibility. Interactive and token-based login, secure copy and tunnels.

Of course, it needs a proper security audit for side channel attacks, protocol vulnerabilities and so on -- but I was impressed by how much simpler a client-server application with crypto and complex terminal handling was in Go.

$ sloc openssh-portable 
  Languages  Files    Code  Comment  Blank   Total  CodeLns
      Total    502  112982    14327  15705  143014   100.0%
          C    389  105938    13349  14416  133703    93.5%
      Shell     92    6118      937   1129    8184     5.7%
       Make     16     468       37    131     636     0.4%
        AWK      1     363        0      7     370     0.3%
        C++      3      79        4     18     101     0.1%
       Conf      1      16        0      4      20     0.0%
$ sloc xs
  Languages  Files  Code  Comment  Blank  Total  CodeLns
      Total     34  3658     1231    655   5544   100.0%
         Go     19  3230     1199    507   4936    89.0%
   Markdown      2   181        0     76    257     4.6%
       Make      7   148        4     50    202     3.6%
       YAML      1    39        0      5     44     0.8%
       Text      1    30        0      7     37     0.7%
     Modula      1    16        0      2     18     0.3%
      Shell      3    14       28      8     50     0.9%

https://gogs.blitter.com/RLabs/xs

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Pros of Common Lisp
Pros of C++
  • 24
    Flexibility
  • 22
    High-performance
  • 17
    Comfortable: garbage collection, closures, macros, REPL
  • 13
    Stable
  • 12
    Lisp
  • 8
    Code is data
  • 6
    Can integrate with C (via CFFI)
  • 6
    Multi paradigm
  • 5
    Lisp is fun
  • 4
    Macros
  • 4
    Easy Setup
  • 3
    Parentheses
  • 3
    Open source
  • 3
    Purelly functional
  • 3
    Elegant
  • 1
    DSLs
  • 1
    Multiple values
  • 1
    CLOS/MOP
  • 1
    Clean semantics
  • 1
    Will still be relevant 100 years from now
  • 1
    Still decades ahead of almost all programming languages
  • 1
    Best programming language
  • 1
    Simple syntax
  • 1
    Powerful
  • 1
    Generic functions
  • 1
    Can implement almost any feature as a library
  • 1
    Formal specification, multiple implementations
  • 202
    Performance
  • 106
    Control over memory allocation
  • 97
    Cross-platform
  • 96
    Fast
  • 84
    Object oriented
  • 57
    Industry standard
  • 47
    Smart pointers
  • 37
    Templates
  • 16
    Gui toolkits
  • 16
    Raii
  • 13
    Generic programming
  • 13
    Control
  • 13
    Flexibility
  • 11
    Metaprogramming
  • 9
    Hardcore
  • 5
    Simple
  • 5
    Full-fledged containers/collections API
  • 5
    Many large libraries
  • 4
    Performant multi-paradigm language
  • 4
    Large number of Libraries
  • 3
    Way too complicated
  • 1
    Close to Reality
  • 1
    Plenty of useful features

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Cons of Common Lisp
Cons of C++
  • 4
    Too many Parentheses
  • 3
    Standard did not evolve since 1994
  • 2
    Small library ecosystem
  • 2
    No hygienic macros
  • 1
    Inadequate community infrastructure
  • 1
    Ultra-conservative community
  • 8
    Slow compilation
  • 8
    Unsafe
  • 6
    Over-complicated
  • 6
    Fragile ABI
  • 5
    No standard/mainstream dependency management
  • 4
    Templates mess with compilation units
  • 3
    Too low level for most tasks
  • 1
    Compile time features are a mess
  • 1
    Template metaprogramming is insane
  • 1
    Segfaults
  • 1
    Unreal engine

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What is Common Lisp?

Lisp was originally created as a practical mathematical notation for computer programs, influenced by the notation of Alonzo Church's lambda calculus. It quickly became the favored programming language for artificial intelligence (AI) research. As one of the earliest programming languages, Lisp pioneered many ideas in computer science, including tree data structures, automatic storage management, dynamic typing, conditionals, higher-order functions, recursion, and the self-hosting compiler. [source: wikipedia]

What is C++?

C++ compiles directly to a machine's native code, allowing it to be one of the fastest languages in the world, if optimized.

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What companies use Common Lisp?
What companies use C++?
See which teams inside your own company are using Common Lisp or C++.
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What are some alternatives to Common Lisp and C++?
Clojure
Clojure is designed to be a general-purpose language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming. Clojure is a compiled language - it compiles directly to JVM bytecode, yet remains completely dynamic. Clojure is a dialect of Lisp, and shares with Lisp the code-as-data philosophy and a powerful macro system.
Haskell
It is a general purpose language that can be used in any domain and use case, it is ideally suited for proprietary business logic and data analysis, fast prototyping and enhancing existing software environments with correct code, performance and scalability.
Python
Python is a general purpose programming language created by Guido Van Rossum. Python is most praised for its elegant syntax and readable code, if you are just beginning your programming career python suits you best.
Racket
It is a general-purpose, multi-paradigm programming language based on the Scheme dialect of Lisp. It is designed to be a platform for programming language design and implementation. It is also used for scripting, computer science education, and research.
Java
Java is a programming language and computing platform first released by Sun Microsystems in 1995. There are lots of applications and websites that will not work unless you have Java installed, and more are created every day. Java is fast, secure, and reliable. From laptops to datacenters, game consoles to scientific supercomputers, cell phones to the Internet, Java is everywhere!
See all alternatives