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1. Top results related to define entry controlled loop

   • define a main() (entry point) for a library necessary?

     Top Answer

     Answered Mar 06, 2020 · 4 votes

     Answering your question: No, you don't need to define a main entry point for a library.

     The key here is the -c option from gcc, which skips the linking stage.

     From the gcc manual

     -c : Compile or assemble the source files, but do not link. The linking stage simply is not done. The ultimate output is in the form of an object file for each source file.

     You can consult more gcc options here.

     Judging form your error output, you probably forgot to add this option, because you are getting a linker error.

     PS: I find that the tutorial your are following has a good introductory explanation on this topic.

     EDIT

     Your problem is related with the difference between compiling an linking.

     C programs are written in human readable source code that is not directly executable by a computer. It takes a three step process to transform the source code into executable code. These three steps are: Preprocessing, compiling and linking

     Preprocessing - Processes directives (commands that begin with a # character) which can modify the source code before it is compiled.

     Compiling - The modified source code is compiled into binary object code. This code is not yet executable.

     Linking - The object code is combined with required supporting code to make an executable program. This step typically involves adding in any libraries that are required.

     Here you can find an interesting tutorial on basic C concepts.

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     1/5

   • Define variable inside while loop

     Top Answer

     Answered Sep 10, 2016 · 1 votes

     Consider using while (true) with a break:

     while (true) { const peek = stack.peek(); if (!(peek in ops) || p(peek) < 10) break; str += stack.pop();}

     In theory you could also do:

     while ( (peek => peek in ops && p(peek) >= 10)(stack.peek())) { str += stack.pop();}

     but that's pretty ugly. It's roughly equivalent to write

     function pop(stack) { const peek = stack.peek(); return peek in ops && p(peek) >= 10;}-while(pop(stack)) str += stack.pop();

     A for loop is not a bad idea either, and could be written as:

     for (let peek; peek = stack.peek(), peek in ops && p(peek) >= 10; ) { str += stack.pop();}-

     which again avoids duplicating the call to stack.peek().

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     2/5

   • Define a 'for' loop macro in C++

     Top Answer

     Answered Jun 24, 2014 · 42 votes

     #define loop(x,n) for(int x = 0; x < n; ++x)-

     Other Answers

     Answered Nov 10, 2020 · 27 votes

     In today's C++ we wouldn't use a macro for this, but we'd use templates and functors (which includes lambda's):

     template<typename FUNCTION>inline void loop(int n, FUNCTION f) { for (int i = 0; i < n; ++i) { f(i); }}// ...loop(5, [](int jj) { std::cout << "This is iteration #" << jj << std::endl; } );

     The loop function uses the variable i internally, but the lambda doesn't see that. It's internal to loop. Instead, the lambda defines an argument jj and uses that name.

     Instead of the lambda, you could also pass any function as long as it accepts a single integer argument. You could even pass std::to_string<int> - not that loop would do something useful with the resulting strings, but the syntax allows it.

     [edit] Via Mathemagician; you can support non-copyable functors using

     template<typename FUNCTION>inline void loop(int n, FUNCTION&& f) { for (int i = 0; i < n; ++i) { std::forward<FUNCTION>(f)(i); }}

     [edit] The 2020 variant, which should give better error messages when passing inappropriate functions.

     inline void loop(int n, std::invocable<int> auto&& f) { for (int i = 0; i < n; ++i) { std::invoke(f,i); }}

     Other Answers

     Answered Jun 24, 2014 · 8 votes

     #define loop(x, n) for(int x = 0; x < n; ++ x)-

     Something like this?

     #include <iostream>using namespace std;#define loop(x, n) for(int x = 0; x < n; ++ x)int main() { loop(i, 10) { cout << i << endl; } return 0;}

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     3/5

   • Define a for loop with pre specified variable values

     Top Answer

     Answered Dec 23, 2013 · 1 votes

     This is how you would create an array and loop over it:

     # create an arrayp=(0 1/15 1/12 1/10 2/15 1/6 1/5 1/4 1/3)-# loop over the elements in the arrayfor j in "${p[@]}"; do echo "$j"done

     Take a look at the Arrays chapter of the Advanced Bash-Scripting Guide.

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     4/5

   • loop through constant enum #define

     Top Answer

     Answered Feb 11, 2015 · 0 votes

     i have found a way to doit but i dont know if that good :

     firstly i have made a color class as following:

     class MyColor{public: string name; int a, r, g, b; D3DCOLOR color; MyColor(); MyColor(string name, int a, int r, int g, int b); void changeAlpha(int a);};MyColor::MyColor(){}MyColor::MyColor(string name, int a, int r, int g, int b){ this->name = name; this->a = a; this->r = r; this->g = g; this->b = b;};void MyColor::changeAlpha(int a){ this->color = D3DCOLOR_ARGB(a, r, g, b);}

     then i copied all my defines in a vector declared as following :

     vector<MyColor*> colorArray{ new MyColor("WHITE", 255, 255, 255, 255), new MyColor("RED", 255, 255, 000, 000), new MyColor("GREEN", 255, 000, 255, 000), new MyColor("BLUE", 255, 000, 000, 255), new MyColor("BLACK", 255, 000, 000, 000), new MyColor("PURPLE", 255, 125, 000, 255), new MyColor("GREY", 255, 44, 44, 46), new MyColor("YELLOW", 255, 255, 255, 000), new MyColor("ORANGE", 255, 255, 165, 000), new MyColor("DEEPSKYBLUE", 255, 30, 144, 255), new MyColor("GOLD2", 255, 238, 201, 0), new MyColor("SQUA", 255, 0, 255, 255), new MyColor("DARKGREY", 255, 62, 62, 62), //... not all is here ;)};

     i added some static method to find a color by name and set the alpha to it like this :

     static MyColor* findColor(string colorName, int ALPHA){ for (MyColor* COLOR : colorArray) { if (COLOR->name == colorName) { COLOR->a = ALPHA; COLOR->color = D3DCOLOR_ARGB(COLOR->a, COLOR->r, COLOR->g, COLOR->b); return COLOR; } } return new MyColor("ElectricLime", 255, 204, 255, 000);}

     and finally in my classes where i need to use them i can call them like it

     //button constructor Button::Button(string text, string name, XMFLOAT2 position, XMFLOAT2 size, CallbackFunction callback) { this->position = position; this->bounds = size; this->text = text; this->name = name; this->callback = callback; this->backColor = findColor("BLACK", 255); this->textColor = findColor("BLUE", 255); this->borderColor = findColor("BLUE", 255); }

     so i really ask if that's a good solution, but for now it do the work and i can loop through my colors...

     Check all answers on Stack Overflow

     5/5

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2. www.geeksforgeeks.org › entry-controlled-loops-inEntry Controlled Loops in Programming - GeeksforGeeks

   www.geeksforgeeks.org › entry-controlled-loops-in

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   15 hours ago · Entry controlled loops in programming languages allow repetitive execution of a block of code based on a condition that is checked before entering the loop. In this article, we will learn about entry controlled loops, their types, syntax, and usage across various popular programming languages.

   • C - Loops - GeeksforGeeks

     Entry Controlled loops: In Entry controlled loops the test...

   • Loops in Programming - GeeksforGeeks

     Loops, also known as iterative statements, are used when we...

3. www.includehelp.com › c-programming-questionsWhat is the difference between Entry Controlled and Exit ...

   www.includehelp.com › c-programming-questions

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   If Test condition is false, loop body will be executed once. for loop and while loop are the examples of Entry Controlled Loop. do while loop is the example of Exit controlled loop. Entry Controlled Loops are used when checking of test condition is mandatory before executing loop body. Exit Controlled Loop is used when checking of test ...

4. People also ask

   What are the examples of entry controlled loops?

   • Below are the examples of Entry-controlled loops: 2. Exit-Controlled loops: In Exit controlled loops the test condition is evaluated at the end of the loop body. The loop body will execute at least once, irrespective of whether the condition is true or false. Do-while Loop is an example of Exit Controlled loop.

   Loops in Programming - GeeksforGeeks

   www.geeksforgeeks.org/loops-programming/

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   What is the difference between DO WHILE LOOP and entry controlled loop?

   • for loop and while loop are the examples of Entry Controlled Loop. do while loop is the example of Exit controlled loop. Entry Controlled Loops are used when checking of test condition is mandatory before executing loop body. Exit Controlled Loop is used when checking of test condition is mandatory after executing the loop body. Related topics...

   What is the difference between Entry Controlled and Exit Controlled

   www.includehelp.com/c-programming-questions/difference-between-entry-and-exit-controlled-loop.aspx

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   What is an example of a control loop?

   • Loop, where test condition is checked before entering the loop body, known as Entry Controlled Loop. Example: while loop, for loop Loop, where test condition is checked after executing the loop body, known as Exit Controlled Loop. Example: do while loop

   What is the difference between Entry Controlled and Exit Controlled

   www.includehelp.com/c-programming-questions/difference-between-entry-and-exit-controlled-loop.aspx

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   What are exit controlled loops?

   • In Exit controlled loops the test condition is evaluated at the end of the loop body. The loop body will execute at least once, irrespective of whether the condition is true or false. Do-while Loop is an example of Exit Controlled loop. Below are the examples of Exit-controlled loops:

   Loops in Programming - GeeksforGeeks

   www.geeksforgeeks.org/loops-programming/

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5. www.codingtag.com › entry-control-loop-in-cEntry Control Loop in C - codingtag.com

   www.codingtag.com › entry-control-loop-in-c

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   The "while" loop is the simplest looping construct in C, executing its body as long as the termination condition holds true. It's referred to as an entry-controlled loop due to its condition being evaluated before entering the loop body. Syntax of While Loop: while (termination_condition) { // while loop body } Example:

   • Author: Rutuparna

6. skillupwards.com › entry-vs-exit-controlled-loopsEntry vs Exit Controlled Loops | SkillUpwards

   skillupwards.com › entry-vs-exit-controlled-loops

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   Entry controlled vs Exit controlled Loops. An entry controlled loop is a loop in which the condition for executing the loop is checked at the beginning of the loop, before the code inside the loop is executed. for loop, while loop are entry controlled loop as they check the condition first before executing the code inside.

7. Videos

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     2:11

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     Difference between Entry control loop and Exit control loop #Entry_v/s_Exit @simanstudies

     Aug 18, 2022

     9.8K Views

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     6:35

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     What is Entry Controlled loop and Exit Controlled Loop in C,C++ & JAVA?

     Dec 7, 2017

     20.1K Views

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     4:09

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     C++ Programming Language Tutorial | Loops in C++ - Part 1 (Entry Controlled Loop) | GeeksforGeeks

     Dec 28, 2017

     10.6K Views

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8. www.learnvern.com › c-programming-tutorial › entryEntry Contolled Loops - For Loop, While Loop - LearnVern

   www.learnvern.com › c-programming-tutorial › entry

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   After checking the condition, if it is true then we will enter the body of the loop and start executing the statements inside the loop. As soon as the statements get over after execution. This arrow you can see, it will again go to check the condition. But if the condition becomes false, we can see in the left arrow.