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1. Top results related to what are the function of dictionary in c compiler and interpreter program

   • What are the differences between using pure C with a C compiler and the "C part" of a C++ compiler?

     Top Answer

     Answered Sep 06, 2010 · 34 votes

     There are a lot of minor nitpicks. One that strikes me as being the most obvious is that in C++, you have to cast the return value of malloc. Also structs are automatically typedefed in C++.

     Always use a C compiler for C code, not C++. C++ isn't perfectly compatible with C.

     A few others:

     • In C, declaring void func(); declares a function that hasn't specifed what its arguments are, whereas in C++, void func(); is equivalent to the C void func(void)', taking no arguments;
     • Prototypes are required in C++, whereas it's generally just a warning in C;
     • The type of character constants (like 'a') is int in C and char in C++;
     • The type of string literals is char [] in C and const char [] in C++;
     • Some legitimate variable names in C, like class, are reserved keywords in C++.

     For all those who don't believe me and are downvoting, check out this C code:

     #include <stdlib.h>-int main(int argc, char **argv) { int *i = malloc(sizeof(int));- return 0;}-

     Compilation under gcc is fine, but compilation under g++ gives the following errors:

     test.c: In function `int main(int, char**)':test.c:4: error: invalid conversion from `void*' to `int*'-

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     1/5

   • What are the Roles of Java Compiler and Interpreter?

     Compiler and Interpreter are two different ways to translate a program from programming or scripting language to machine language. In this article let’s discuss on what are the roles of the Compiler and Interpreter in Java.

     Java Compiler

     A compiler in Java translates the entire source code into a machine-code file or any intermediate code, and that file is then executed. It is platform-independent. A bytecode is basically an intermediate code generated by the compiler after the compilation of its source code. Java compiler can be operated by using the “Javac.exe” command from the command prompt. Some of the compiler options are given below:

     • -help: it prints a summary of standard options.
     • -version: returns the compiler information.
     • -verbose: verbose output i.e., it includes information about each source file compiled and each class loaded.
     • -nowarn: it is used to turn off warnings. 

      

     Java Compiler Step By Step

      

     Roles of...

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     2/5

   • What are the Roles of Java Compiler and Interpreter?

     Compiler and Interpreter are two different ways to translate a program from programming or scripting language to machine language. In this article let’s discuss on what are the roles of the Compiler and Interpreter in Java.

     Java Compiler

     A compiler in Java translates the entire source code into a machine-code file or any intermediate code, and that file is then executed. It is platform-independent. A bytecode is basically an intermediate code generated by the compiler after the compilation of its source code. Java compiler can be operated by using the “Javac.exe” command from the command prompt. Some of the compiler options are given below:

     • -help: it prints a summary of standard options.
     • -version: returns the compiler information.
     • -verbose: verbose output i.e., it includes information about each source file compiled and each class loaded.
     • -nowarn: it is used to turn off warnings. 

      

     Java Compiler Step By Step

      

     Roles of...

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     3/5

   • What are the different between calling constructor and calling function pointer of constructor in C++

     Top Answer

     Answered Jan 28, 2024 · 0 votes

     Calling a constructor and calling a function pointer of a constructor in C++ are very similar in the sense that they are both quite impossible:

     • You cannot call a constructor in C++.
     • You cannot obtain a pointer to a constructor in C++.

     According to the C++ spec about constructors:

     Constructors have no names and cannot be called directly.

     So, in C++, you do not call constructors. The language does that for you when you use the new keyword, when you declare an object on the stack, etc. The expression new MyClass() might look like a constructor invocation, and it does in fact contain a constructor invocation, and so it might be mistaken for a constructor invocation, but that's not what it is; it is a "new expression", which includes, among other things, an invocation of a constructor. But the other things are crucial: you cannot just skip them and directly invoke the constructor.

     Function pointers of constructors do not exist because normally you cannot take the address of a constructor. If you examine the names exported by the DLL, and somehow figure out which name corresponds to the constructor, and use that name to obtain the entry point of that constructor from the DLL, you are cheating: you are doing something which is not normally supported by the language. As a result, you should not attempt to invoke that entry point. A constructor is only supposed to be invoked by the language.

     Also according to the C++ spec:

     A constructor is a special non-static member function of a class.

     (Emphasis mine.)

     A constructor assumes that memory has been allocated, and proceeds to initialize that memory. The language takes care of the memory allocation, but invoking the constructor directly does not. Since a constructor is non-static, it expects an uninitialized this to be passed to it, but you are not allocating any memory and you are not passing anything to the constructor. The result is exactly as expected: a crash.

     And besides, think about it: the constructor could not be internally allocating the memory, because how would it work then if the object was allocated on the stack? And how would it work if the constructor was being invoked by the constructor of a derived class which presumably occupies more memory?

     You can get your DLL to work by using a factory method. A factory method is a public static method which executes new ClassA() and returns the result, or declares ClassA() and returns it by value. Then, obtain the address of the factory method from the DLL, and invoke it.

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     4/5

   • What are the advantages and disadvantages of having multiple small methods in a C# program?

     Top Answer

     Answered Feb 23, 2011 · 2 votes

     This question is pretty vague, but here are my general thoughts:

     More methods will not slow your app down to any noticeable degree. That is optimization at really minute levels and is not worth the time.

     Smaller methods are easier to read and ingest. They also are more likely to have only one duty. Both very good things.

     Many methods can force a reader to maintain a large "mental stack" as they read through code and have to keep track of a lot of method calls. As long as methods do only one thing, and are named well, this is usually not a problem.

     It really depends on your situation, what you're writing, etc. But in general, my rule of thumb is several small methods are better than one big, monolithic method.

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     5/5

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2. www.geeksforgeeks.org › implementation-on-map-orImplementation on Map or Dictionary Data Structure in C

   www.geeksforgeeks.org › implementation-on-map-or

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   Mar 27, 2023 · Last Updated : 27 Mar, 2023. C programming language does not provide any direct implementation of Map or Dictionary Data structure. However, it doesn’t mean we cannot implement one. In C, a simple way to implement a map is to use arrays and store the key-value pairs as elements of the array .

3. stackoverflow.com › questions › 2377273How does an interpreter/compiler work - Stack Overflow

   stackoverflow.com › questions › 2377273

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   Mar 4, 2010 · Interpreter maps input to output using the source program. Then machine-language targeted program produced by the compiler is much faster than the interpreter at mapping inputs to output. However, since interpreter executes source program line by line it gives better error diagnostics than compiler.

   • Compilers. Compilers were the first sort of translator program to be written. The idea is simple: You write the program, then hand it to the compi...
   • What is a translator? An S -> T translator accepts code expressed in source language S, and translates it to equivalent code expressed in another...
   • Compiler, transforms source code in one computer language to another one. Interpreter, executes source code directly (usually inside its own virtu...
   • What is the difference between interpreter and compiler? The Compiler scans whole program first and then translates it into machine code which wil...
   • The Difference vs How they Work. Q:What are Compilers and interpreters used for ? A: Most programs are written in High-level languages (c#,java.....
   • Compilers - A compiler translates a source language to a target language. Then the target language takes input and gives output. Compiler produces...
   • What is the difference between interpreter and compiler. To put it directly and intuitively: Compiler is what translates the human-readable sourc...

4. People also ask

   What does a compiler interpreter do?

   • Like the compiler, the interpreter enables the user to execute source code written in a high-level programming language. However, an interpreter does not produce an executable; instead, it evaluates and executes the source code directly. Thus, to run a program multiple times, the source code must be processed each time by the interpreter.

   Compiler vs Interpreter: Understanding the Differences

   dev.to/mrsth/compiler-vs-interpreter-understanding-the-differences-d36

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   How does a compiler interpret a source code?

   • A compiler bundles the entire source code and translates it once only. So it takes your whole source code as input, which it converts and sends to the CPU to get an output. For interpreted code, errors are more traceable since the interpreter can report them by directly referring to the original source.

   Interpreters and Compilers: What Are They and How Are They Different…

   www.makeuseof.com/interpreters-compilers-what-how-different/

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   Does C# use both compiler and interpreter?

   • It takes the program, one line at a time, and translates each line before running it: It translates the first line and runs it, then translates the second line and runs it etc. Compiler characteristics: Interpreter characteristics: so c# uses both compiler and interpreter? That's not correct. Both languages are both compiled and interpreted.

   How does an interpreter/compiler work - Stack Overflow

   stackoverflow.com/questions/2377273/how-does-an-interpreter-compiler-work

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   What does a compiler do?

   • A compiler translates a high-level programming language into assembly code, object code or directly into machine code and produces an executable binary for a specific architecture and system. The compilation process consists of five steps, each step performed by its corresponding component 1 2.

   Compiler vs Interpreter: Understanding the Differences

   dev.to/mrsth/compiler-vs-interpreter-understanding-the-differences-d36

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5. en.wikipedia.org › wiki › Interpreter_(computing)Interpreter (computing) - Wikipedia

   en.wikipedia.org › wiki › Interpreter_(computing)

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   A compiler can thus make almost all the conversions from source code semantics to the machine level once and for all (i.e. until the program has to be changed) while an interpreter has to do some of this conversion work every time a statement or function is executed. However, in an efficient interpreter, much of the translation work (including ...

6. www.makeuseof.com › interpreters-compilers-whatInterpreters and Compilers: What Are They and How Are They ...

   www.makeuseof.com › interpreters-compilers-what

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   Jul 12, 2023 · Code Execution: Input and Output Processing. An interpreter can only collect, translate, and execute each input per line. It runs each line of the source code sequentially as it comes, and the final output depends on what each line outputs during execution. A compiler bundles the entire source code and translates it once only.

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7. dev.to › mrsth › compiler-vs-interpreterCompiler vs Interpreter: Understanding the Differences

   dev.to › mrsth › compiler-vs-interpreter

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   Aug 23, 2023 · Like the compiler, the interpreter enables the user to execute source code written in a high-level programming language. However, an interpreter does not produce an executable; instead, it evaluates and executes the source code directly.

8. builtin.com › compiler-vs-interpreterCompiler vs. Interpreter in Programming | Built In

   builtin.com › compiler-vs-interpreter

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   Apr 24, 2023 · A compiler translates code written in a high-level programming language into a lower-level language like assembly language, object code and machine code (binary 1 and 0 bits). It converts the code ahead of time before the program runs. An interpreter translates the code line-by-line when the program is running.

9. www.cs.toronto.edu › Week7-Compilers-LibrariesCompilers, Interpreters, Libraries - Department of Computer ...

   www.cs.toronto.edu › Week7-Compilers-Libraries

   Compiler vs. Interpreter • Somehow we need to convert a program into machine code (object code). • A compiler passes over a whole program before translating it into object code. • An interpreter reads and executes one line of code at a time. • An interpreter is a compiled program (often written in C).