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C vs D: What are the differences?
Developers describe C as "One of the most widely used programming languages of all time". . On the other hand, D is detailed as "Modern convenience. Modeling power. Native efficiency". D is a language with C-like syntax and static typing. It pragmatically combines efficiency, control, and modeling power, with safety and programmer productivity.
C and D belong to "Languages" category of the tech stack.
"Performance" is the primary reason why developers consider C over the competitors, whereas "Compile-time function execution" was stated as the key factor in picking D.
According to the StackShare community, C has a broader approval, being mentioned in 64 company stacks & 251 developers stacks; compared to D, which is listed in 6 company stacks and 6 developer stacks.
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
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");
}
}
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.
includemay Allah bless you ^_^
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.
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%
Pros of C lang
- Performance69
- Low-level49
- Portability36
- Hardware level29
- Embedded apps19
- Pure13
- Performance of assembler9
- Ubiquity8
- Great for embedded6
- Old4
- Compiles quickly4
- No garbage collection to slow it down3
- OpenMP2
- Gnu/linux interoperable2
Pros of D
- Compile-time function execution16
- Makes functional programming style easier12
- Productive12
- Much easier to do Concurrent/Parallel vs C/C++12
- Simple but Powerful template-based generics11
- Powerful static function to avoid macro11
- Meta program is much easier to read/write vs. C++10
- It support unittest etc9
- Assembler is support directly in the language9
- System program language like C++ and C9
- Supports code covarge directly in the compiler9
- Metaprogramming7
- Supports both manuel memory and garbage collection7
- Plugs directly into C6
- Easy to translate from Java and C# to D6
- Feels and looks like C, so it's easy to learn5
- Amazing developer productivity4
- Fast2
- Performance2
- Syntax uniformity across pre-compile/compile/runtime1
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Cons of C lang
- Low-level5
- No built in support for parallelism (e.g. map-reduce)3
- Lack of type safety3
- No built in support for concurrency3
Cons of D
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What is C lang?
What is D?
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