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Need help with fscanf's blue.

Alberto last edited by

I don't know what a teacher wants from me. ♪ ♪ I'm in the cycle scanning the sequence and the type of all the occiphers are still comparable to one, then out of the cycle, so I'm asking you to make sure that I put the league on the screen the values that Fscanf returns... I don't understand how to do it, don't you tell me?
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jeanid last edited by
There are two options for answering the question (which is correct, it is difficult to understand):
(1) Removal to the printed F-y fscanf values:
```
int value, n;
fscanf(file_pointer, "%d", &value);
printf("%d\n", value);
```
(2) Extraction of the number of F-sized fscanf values (originally reverted)
```
int value, n;
n = fscanf(file_pointer, "%d", &value);
printf("%d\n", n);
```
For use above fsanf (to remember this function with a variable number of arguments) n may accept: 1 - All RS, counting exactly 1 number; 0 - the whole number was not considered; or EOF - at the end of the file.
```
int n;
while ((n = fscanf(...)) == 1) {
   printf("%d\n", n);
   ...
}
```
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I need help with forms.
Software Programming • php formularies • • emmalee

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As @A.Cedano commented, PHP is not the most appropriate option for this exercise, although it can be achieved using session variables; the main problem would be with the handling of times, because it should be considered that there are "dead times" between which PHP generates the code and the browser interprets it; the same thing when processing the form.The whole code is with comments so you know how everything works, the only thing to clarify is the way the numbers are generated:new Array(3) creates a space arrangement for 3 elements, initially empty.fill() fills all the spaces with undefined, is a preparation to be able to assign values.map() travels the elements and assigns random valuesMath.random() generates floating point numbers between zero and 1, which is why it is used parseInt()To make it whole, it multiplies by the difference between the minimum maximum number and the minimum is added. https://developer.mozilla.org/es/docs/Web/JavaScript/Referencia/Objetos_globales/Math/random .let nums, segundos, inter, aciertos = 0, errores = 0; // Todos los input en un array de 4 elementos, 3 de valores y uno de suma let inputs = document.querySelectorAll('input'); // Botón comenzar y comprobar let comenzar = document.querySelector('#comenzar'); let comprobar = document.querySelector('#comprobar'); // Elementos que se deben actualizar: tiempo y resultado let tiempo = document.querySelector('#tiempo'); let resultado = document.querySelector('#resultado'); function jugar() { // Llenar arreglo de números al azar nums = new Array(3).fill().map((_, i) => parseInt(Math.random() * (9999 - 1000) + 1000)); // Llenar inputs con valores del arreglo nums.map((a, i) => inputs[i].value = a); // Activar input para suma inputs[3].disabled = false; inputs[3].focus(); // Desactivar botón comenzar y activar comprobar comenzar.disabled = true; comprobar.disabled = false; // Limpiar div de resultados resultado.innerText = ''; // Inicializar tiempo y mostrar segundos = 0; tiempo.innerText = segundos; // Actualizar tiempo cada segundo inter = setInterval(function() { segundos ++; tiempo.innerText = segundos; }, 1000); } function comprueba() { // Dejar de contar tiempo clearInterval(inter); // Desactivar input de suma y botón comprobar, activar botón comenzar inputs[3].disabled = true; comenzar.disabled = false; comprobar.disabled = true; // Obtener valor del campo suma o cero si está vacío total = parseInt(inputs[3].value) || 0; // Sumar los valores del arreglo y comparar con entrada del usuario correcto = nums.reduce((a, b) => a + b); if(total == correcto) { resultado.innerText = 'Acertaste'; aciertos ++; } else { resultado.innerText = 'Error, el resultado correcto es: ' + correcto; errores ++; } resultado.innerHTML += <br> <b>Total de aciertos: ${aciertos}</b><br> <b>Total de errores: ${errores}</b><br> Click en "Comenzar" para probar nuevamente.; } // Asignar evento a botones comenzar.addEventListener('click', jugar); comprobar.addEventListener('click', comprueba);input { width:120px; font-size:2em; text-align:right; }<p><button id="comenzar">Comenzar</button></p> <input type="number" id="num1" disabled><br> <input type="number" id="num2" disabled><br> <input type="number" id="num3" disabled><br> <input type="number" id="suma" placeholder="Suma  " disabled> <div>Tiempo: <span id="tiempo"></span></div> <button id="comprobar" disabled>Comprobar suma</button> <div id="resultado"></div>Note: If I have a chance, later or tomorrow I add an option with PHP.
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Help me cut the file. We need to minimize the code in the file.
Software Programming • javascript jquery • • amarantha

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Gulp/webpack/grunt aidOr find some kind of online tool.the example is this resource. https://javascript-minifier.com
K

I need help on the structure 'if and else'
Software Programming • python if else • • Kadyn

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Yes, you can.if m > 1: b = 'metros' d = 'equivalem' else: b = 'metro' d = 'equivale' If you're going to use the following words, then you don't even have to keep two variables:if m > 1: b = 'metros equivalem' else: b = 'metro equivale' https://github.com/maniero/SOpt/blob/master/Python/Algorithm/SameConditional.py .I think it would be better to use more significant variable names.Have you ever thought the person can type 0? What solution do you want to give for this? Will it pluralize?You can do this in a more modern and correct way, but I chose not to introduce these things to you now.Rounding has already been answered in https://pt.stackoverflow.com/q/44715/101 .
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C code security
Software Programming • c language • • rielyn

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In all functions the parameter fileName Makes sense. const char *♪Positioning fseek(fp, 0L, SEEK_END) I don't know what to do. And if it's backed up, it's for you. Binary flows. Therefore, functions getFileSize You need to open your file in binary mode. "rb"♪ The same applies. getFileContents♪Function fseek returns 0 at successes Positioning. You have all the conditions for success checks. fseek It's written on the contrary.And there's also a condition of success that says, "through."char *fileContents = calloc(fileSize + 1, sizeof(char)); if (fileContents) { // <-- ??? fclose(fp); return NULL; } What's the point you're putting in fseek(fp, 0L, SEEK_SET) before the file is closed getFileSize? Why are you doing this?Functions getFileContents Determination of the size of the file (loss) getFileSizecould be implemented before opening the file. Why fertilize other levels of discovery (one and the same) of the file? And why do you need to make extra care fclose(fp) If there's a mistake?Why is memory spreading? +1 More than the size of the file? You want a zero-terminated line as a result? Is that a text file?Excessive typology of the souffix constant L - Why?
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How do I round a float number of two decimal places to one if you have only one number? example: 2.10 to 2.1
Software Programming • c language • • courtlanda

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Conversion Specifier %g is able to display only significant digits of a type float.For example:#include <stdio.h> int main( int argc, char * argv[] ) { float a = 1.1230000; float b = 3.14150000; float c = 10; printf( "a = %g\n", a ); printf( "b = %g\n", b ); printf( "c = %g\n", c ); return 0; } Output:a = 1.123 b = 3.1415 c = 10 References:Output Conversion Specifier %gThe values are displayed in the format %f or %e, depending on what more compact for the value and for the accuracy that have been specified. The format %e will only be used when the value exponent is lower than that of what -4 or greater or equal to the accuracy argument. Zeros to the left are truncated, and the decimal point is displayed only if one or more digits come in sequence.Source: http://man7.org/linux/man-pages/man3/printf.3.html
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I need help keeping information from a boolean column in a jtable
Software Programming • java • • gionna

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What you could do is create a class with the registration data, and also add the checkbox variable, for examplepublic class Modelo { private cant; private registro .... private boolean check; once done this by making the query inserts in the object and not directly the table, those objects insert them into a List or in a ArrayListAnything and there you fill your board. In this way the check will be pointing to a variable that is not destroyed by removing the column so by marking it in search it will be changing to the object, when returning to the table the check of the object remains marked.If you like the idea to give an eye to Hibernate, what it does is proper to turn queries into previously mapped class objects is what is known as ORM (Object Relation Mapping)tuCheckbox.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { if (tuCheckBox.isSelected()) { tuObjeto.setElNombreDeTuBoolean(true); } else { tuObjeto.setElNombreDeTuBoolean(true); } } }); That adds it to each checkbox at the time of filling the table
E

You guys need help on the back, Browser doesn't see the code properly.
Software Programming • html cs html5 cs3 • • emerson

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Brauser, sees your code exactly as you wrote it and sees it adequate.Now I'll try to explain what happened.For starters, you have to figure out what you saw because what you showed in the first picture. is not the original page code♪In order to see the original page code, you need:Press the right mice key. Pick up the page code section.And the code in this case will match the code in the second image.In the first image, you are shown real DOM structure of the document - The real tree of the elements with which the browser works, which he's trying to build on your reference code.Accordingly, your question is as follows:Why is the real DOM-page structure different from the reference code?The answer is simple:The real DOM structure cannot match the original code because the reference code contains errors.(in HTML4.1 - see UPD1)Brauser as an annex is unable to transfer errors from the reference code to the real DOM structure, since its elements would be unpredictable and could lead to an accidental completion of the annex.As a basis, the browser accepts the W3C standards and the more your code matches them, the more the real DOM structure matches your code.Browser's mistakes are still detecting a syntax analysis of the reference code.Then, at the stage of the tree construction, the browser tries to make mistakes.What was your mistake?In accordance with the rules of the <a>Any reference is a built-in element, so it has the same rules as for built-in elements. I mean, you can't placed inside the current. <a> Blade elements. ♪ ♪So the browser sees <div>You're inside. <a>just pulled them out.UPD1The above-mentioned description of the conduct in a specific case and the user @Air, the new HTML5 standard already has other rules, so it's true that The case should be dealt with in greater detail and the standards clarified.For starters:The version of HTML5 allows for the introduction of blades if they do not involve interactive behaviour. This raises the question:How does the browser define the standard to compare your document and how does it define the version of the document?To this end, it is necessary to familiarize itself with the concept of DOCTYPE:What is DOCTYPE?DOCTYPE is located at the very beginning of the HTML document code and is necessary for the browser to be converted into compliance mode. Only in this mode can the HTML pages be uniformly displayed in different browsers. (Browser is a site-based programme.)Without DOCTYPE (or incorrect DOCTYPE), the browsers display a page in interoperability with old browsers, up to their errors (bags). In addition, modern opportunities (e.g. support to CSS padding for IMG) are available only in compliance mode. HTML-DOCTYPE-Appointment should always be provided.Accordingly, if you deliberately want to switch to HTML5, you will mandatory at the beginning of document DOCTYPE.For HTML5, it will look as follows:<!DOCTYPE html> For other versions of DOCTYPE, the following page may be viewed: https://www.w3schools.com/tags/tag_doctype.asp
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We need to help write the code in the python.
Software Programming • python python 3.x • • Avante

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I've decided through the processing of exceptions:def mylen(list): tmp = 0 i = 0 while True: try: tmp = l[i] #пытаемся присвоить переменной tmp значение списка i+=1 except IndexError: #если i вышло за размаеры списка - завершаем цикл break return i l = [1,2,3,4] i = mylen(l) #теперь i - кол-во элементов print("Количество элементов равно ",i) You've got the length, you'll get it on your own.UPD added finding:tmp = 0 sum = 0 while tmp < i: sum += l[tmp] #просто прокручиваем список #и прибавляем к sum его значения один за другим tmp += 1 print("Сумма элементов равна:",sum)
O

Help implement the algorithm on s++
Software Programming • c++ algorithm lines • • Oba22

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We need to follow the algorithm as you describe it.Your code doesn't make any sense of what language you write the program, whether on C or on C+. On the one hand, the C++ standard withdrawal flow, on the other hand, function C, is used.Function main without parameters shall be declared in C++, asint main() There's no point in dynamically distributing the masses. They could be declared local variables.Function gets It is not safe, and it is no longer supported by the C standard itself. It should therefore not be used.If you just have to put a word out of the proposal to the consortium, there's no need to declare a subsidiary body.Standard C functions in the heading can be used to recognize puncture and gaps <cctype>♪ The programme may look as follows:#include <iostream> #include <cctype> int main() { const size_t N = 100; char s[N]; std::cout << "Enter a sentence: "; if ( std::cin.getline( s, sizeof( s ) ) ) { for ( const char *p = s; *p; ) { while ( std::ispunct( ( unsigned char )*p ) || std::isspace( ( unsigned char )*p ) ) ++p; const char *first = p; while ( *p && !std::ispunct( ( unsigned char )*p ) && !std::isspace( ( unsigned char )*p ) ) ++p; if ( first != p ) std::cout.write( first, p - first ) << std::endl; } } return 0; } The programme dialogue may be as follows:Enter a sentence: first, second, third, fourth, fifth! first second third fourth fifth
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We need help, we need to put a picture on the button.
Software Programming • html • • yajahira

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You can do it yourself. input I' you know what I mean? submit♪<form onsubmit="alert('Hello')"> <input type="image" name="submit" src="https://cdn.sstatic.net/Sites/stackoverflow/img/apple-touch-icon@2.png?v=73d79a89bded" alt="Submit" style="width:40px;"/> </form>
M

Why is the introductory operator(+,-,/,*) and t
Software Programming • c++ c language • • meriah

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Make a char type variable and change your scanf ("%d,"c); scanf("%c,"c);UPD: For the correct operation of the code, the input flow shall be cleaned. I'm more focused on C++, C's less, but the right thing can alwaysling:fseek(stdin,0,SEEK_END); As I understand, you need to add this after the first and second entry, if I'm wrong, please, please.UPD2: It's weird, running the code in the 10th studio, it's working. I'. http://ideone.com/CZgB8U - not working.
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Segmentation Fault in Structs C array
Software Programming • c language struc languaget • • esther

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grafo = (Node*)malloc((numVertices) * sizeof(struct Node*)); Reading this code very carefully: Calculate size a pointer for a struct and allocates a certain number of these hands. I believe you want to allocate structs and not pointers to structs. Remove the last asterisk from the line, so:grafo = (Node*)malloc((numVertices) * sizeof(struct Node)); And of course, the parentheses no numVertices and type conversion at the end is redundant. You can write only:grafo = malloc(numVertices * sizeof(struct Node));
E

how to check whether the whole number of languages is
Software Programming • c language • • emran

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# include <stdio.h> # include <stdint.h> # include <stdbool.h> static inline bool isint ( double d ) { return d == (int64_t)d ; } int main(){ printf("isint(3) = %d\n",isint(3)); printf("isint(3.1) = %d\n",isint(3.1)); } isint(3) = 1 isint(3.1) = 0 supplementIf the accuracy and importance of the limits of the whole type are needed, double control is required. First we count the number, then we write in the line. It will be considered that the phrase in question meets the conditions if the recording of the whole number in the stork matches the word. There's no record of the display. 1e1with a point 1.0 and positive number of sign plus +1♪char s[100] ; scanf("%99s",s); int i ; sscanf(s,"%d",&i); char s2[100] ; sprintf(s2,"%d",i); if (strcmp(s,s2)==0) printf("integer %d\n",i); else printf("is not integer %s\n",s); integer 1234567890 is not integer 12345678901
E

Need help in recording the user &apos; s contact with OBD
Software Programming • python telegram bot aiogram • • emran

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In order to catch the user's contact, you can use a parameter. content_types=["contact"]in your Handler.async def create_user(user_id: int, phone: str): conn = sqlite3.connect('bigben.db') cursor = conn.cursor() cursor.execute('INSERT INTO krasusers (user_id, telefone) VALUES (?, ?)', (user_id, phone)) conn.commit() conn.close() @dp.callback_query_handler(text="private_office") async def private_office_handler(query: CallbackQuery): keyboard = ReplyKeyboardMarkup(resize_keyboard=True).add( KeyboardButton(text="Отправить свой номер телефона", request_contact=True) ) await bot.send_message( query.from_user.id, MESSAGES["send_contact"], reply_markup=keyboard, parse_mode="MarkdownV2", ) @dp.message_handler(content_types=["contact"]) async def contact_handler(message: Message): contact = message.contact await create_user(message.from_user.id, contact.phone_number)
How to read from stdin in C?
Software Programming • c language console data entry • • carriann

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It depends on the purpose, whether you want to read a character, a sequence or a specific format. Some today depends more on taste.getchar()Just read a character, nothing more than this. No matter what. Normally used when you want to control data entry the way you well understand. It can be used to compose data reading functions more complexly.fgetc(), getc()It would only make sense to compare them to read the stdin if it was used as a parameter since these functions read some stream stream stream stream stream stream to be specified, ♪ It's one of them.So to read stdin ends up being a matter of taste. In general the person standardizes to use one or another always. Many people prefer to ignore two of these three functions always. For what I understand fgetc() is the most chosen by the most experienced programmers.The first must necessarily be a function and the second can be implemented as a macro. What makes no difference in current implementations since the first can be optimized by the compiler with inline.fgets()Read a string until you find a \n (which will be obtained, for example, when you type an ENTER) in a simple way without caring what these characters are, except the terminator. It specifies a maximum size of characters that can be read, so it will be terminated when you reach this limit even if you do not find the terminator. The limit is always a character unless specified because at the end a character is included NULL to finish string.He's waiting for the entrance \n by buffer the ♪ (possibly coming from the keyboard.scanf()This is the most powerful function because it reads strings according to a format, thus making some filter than it can enter.With it you can determine the maximum number of characters typed, whether you can type any character or only a few are accepted (for example, only numeric digits). Anyway you have to study http://en.wikipedia.org/wiki/Scanf_format_string .Important also note that the input string can be converted to a specific type, i.e. you read a string but the end result can be a number (int, float, etc.).The use of the "%c" parameter is determined to read only one character, functioning as well as the first functions.One important difference for others is that your return indicates the success or failure of reading. The result itself is "returned" through a reference to a variable (passed by pointer).If you have more than one can have problems with release buffer in some situations. I see bug because of this. And solutions that don't always work. It is not useful beyond very simple things.InadequacyBeing a vulnerable function like so many others in C is common for someone to use other custom functions to do the same. Functions of third-party or own-ready libraries tend to better meet real needs and better control possible exploitation of poorly formatted entries.And it's not just a security issue, a lot can go wrong when you use this function. I am not saying that it is terrible to use, only that it expects a minimum of coherence by the typist. And a serious program can't wait for this, it should treat the most extreme possibilities that someone can do.Out of the naive, learning applications, one usually uses some other solution or at most reads everything as character and then is made a conversion to a type through an algorithm (probably in specific function) making a series of validations. We hardly ever see serious applications relying on validation and conversion of scanf().Glad you didn't want to know how to use gets(). As it does not limit the size of the can receive data is used for security breach. He has a serious problem http://en.wikipedia.org/wiki/Buffer_overflow . Of course, any solution if misused can also have problems. O scanf() may have the same or other problems if you do not use with correct parameters.Teaching the simplest way seems appropriate to facilitate learning. The problem is the person learns so without understanding the whole and uses resources that only serve for learning in software that goes to production. Luckily often these people end up not passing learning using C and do not cause any major problems for everyone.ConclusionIf you don't care much about the fine processing of data entry the most common is to use even the scanf() that gives more possibilities than other options. The others are often used in more specific cases, in general when you will do something more low-level, possibly build a more complex and more suitable reading function than you need.In practice when data entry is important and needs a more serious validation, creating a more complex and appropriate function to the problem is the best solution.There are also rare new serious console applications nowadays. The preference today is by GUI or web and/or use of an API that controls data entry itself.When someone will do something for console nowadays is almost always an internal utility that will be used by people who know how to properly use a poorly validated software. The other cases need better forms of data entry than the above.Example of function to manipulate data input:int getUserInput(char * returnStr, int maxStringLength) { char *tempStr; int maxLen, totalCount = 0; size_t len; maxLen = maxStringLength + 2; //account for NULL and /newline tempStr = malloc(maxLen * sizeof(char)); //temporary holder do { fgets(tempStr, maxLen, stdin); // get chars from input buffer len = strlen(tempStr); if (tempStr[len-1] == '\n') { // newline indicates end of string tempStr[len-1] = '\0'; // delete it len = strlen(tempStr); // and recalc length } totalCount += (int)len; } while ((int)len > maxStringLength); // continue to flush extras if too long strcpy(returnStr, tempStr); // copy temp string into output free(tempStr); // and release memory return totalCount; // may be more than the number allowed } https://github.com/maniero/SOpt/blob/master/C/Console/GetUserInput.c .Retreat https://www.daniweb.com/software-development/c/code/268836/how-to-get-user-input-from-console-safely- . This code can be improved well.

Need help with fscanf's blue.

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