Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.

Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).

How do you break the char mass by number through the separator?

K
Kadyn last edited by

Hi, I have a question: from the text file, I'm pulling a line into a char mass, which looks like {5_12_-3_89_1_-1#}, can we split it into separate numbers separated by the "_"? That the first element of the mass is 5, 2-12, 3-3, etc.?
Reply Quote 0
1 Reply Last reply

irl

The most correct (C++) execution option through std::getline():

const char* line = "5_12_-3_89_1_-1#";
std::string num;
std::stringstream nums(line);
while (std::getline(nums, num, '_'))
{
//work with num
}

2
Posts

0
Views

Suggested Topics

T

Create a function that accepts the mass of the numbers and returns the difference between the largest and lowest in the mass
Software Programming • javascript fumes • • tahishae

2

0
Votes

2
Posts

0
Views

S

const getDifference = arr => Math.max(...arr) - Math.min(...arr) console.log(getDifference([42, 45, 1, 78, 92, 10]));
S

No matching function for call to 'Class::Class()'
Software Programming • c++ poo • • shizuka

2

0
Votes

2
Posts

0
Views

J

Your whole problem is reproducible with this simple code:struct C { C(int){}; }; int main() { int n{}; std::cout<< "Cuantos n? "; std::cin >> n; C *c = new C[n]; // error al querer reservar memoria para 'n' C return 0; } The error is quite clear and you have it in your own title, but I don't know why with a changed name:You're missing default builder. Cine. By asking for memory Cine:C = new Cine[n]; You're building. n instances, each of the instances, according to their builder require a Ficha One int and one string:Cine(Ficha,int=1,string=""); The entire and the chain have a default parameter but the parameter Ficha is required... Where are you going? each one of the n created instances? Nowhere, that's the mistake.SolutionYou have 3 solutions to your problem.Create a builder without parameters.class Cine { public: Cine(Ficha,int=1,string=""); Cine() // <---- constructor sin parametros { ... ... ... } void Leer(); void Imprimir(); void modificaTuFichaCine(Ficha); private: Ficha fichacine; int NumeroDePeliculas(); string ArregloDePeliculas(); }; If you have a C++11 or higher compiler, you can tell the compiler to generate the default code for the builder without parameters:class Cine { public: Cine(Ficha,int=1,string=""); Cine() = default; // <---- constructor por defecto void Leer(); void Imprimir(); void modificaTuFichaCine(Ficha); private: Ficha fichacine; int NumeroDePeliculas(); string ArregloDePeliculas(); }; Defines a default value for the first parameter Cineclass Cine { public: Cine(Ficha={},int=1,string=""); void Leer(); void Imprimir(); void modificaTuFichaCine(Ficha); private: Ficha fichacine; int NumeroDePeliculas(); string ArregloDePeliculas(); }; Use http://es.cppreference.com/w/cpp/container/vector .std::vector has one http://es.cppreference.com/w/cpp/container/vector/vector in which you can tell you how many elements you want to build and take as model an element already built, so you could do:int main() { int n{}; std::cout << "Cuantas Peliculas? "; std::cin >> n; std::vector<Cine> C(n, Cine{Ficha{}}); for (int i = 0; i < n; ++i){ std::cout << "Ingrese los datos de la pelicula " << i + 1 << std::endl; C[i].Leer(); system("cls"); } for(int i = 0; i < n; ++i){ std::cout << "Las peliculas en el cine son: " << std::endl; C[i].Imprimir(); } // No necesitas delete C, "se borra solo". return 0; } Additional notes.If you're gonna fill in the data Cine later to build it (instead of at the time of construction) why do you give it a builder with parameters?, remove that builder.The using namespace std It's not sin, but I advise you to take a look at it. https://es.stackoverflow.com/questions/460/por-qu%c3%a9-el-usar-using-namespace-std-se-considera-mala-pr%c3%a1ctica to know why it's usually dislodged.Abusas de std::endlwhich is normally not a good idea, I advise you to take a look at https://es.stackoverflow.com/questions/14969/c-stdendl-vs-n to learn more details.In the loops for https://vitaminacpp.wordpress.com/2012/04/10/leyenda-pre-y-post-incremento/ .
G

Break the mass on the elements of the second set
Software Programming • php • • gionna

2

0
Votes

2
Posts

0
Views

J

foreach ($arr2 as $value) { foreach ($arr1 as $key => $search) { $arr1[$key] = preg_replace("/$value$/", "_$value", $search); } } print_r($arr1);
K

How to make the node of a binary tree store in a single node, 4 variables?
Software Programming • c++ binary trees • • kalena

2

0
Votes

2
Posts

0
Views

A

You've done it.In your code, you dostruct Nodo { int datos; Nodo *izq; Nodo *der; }; Nothing prevents you from using a structure to store data; for example:struct Datos { string local; strict visitante; int localg; int visitanteg; }; I do not know if you are allowed to create custom operators; if possible, you can add the required operators (<, ==, !=... If not, then add the methods you need.Now, we changed something. Nodo:struct Nodo { Datos datos; Nodo* izq; Nodo* der; }; And we changed the rest of the functions:ABB crearNodo( struct Datos &d ) { nodo* nuevoNodo = new nodo; nuevoNodo->datos.local = d.local; nuevoNodo->datos.visitiante = d.visitante; nuevoNodo->localg = d.localg; nuevoNodo->visitanteg = d.visitanteg; nuevoNodo->izq = NULL; nuevoNodo->der = NULL; return nuevoNodo; } And similar changes with the rest of the code:void insertar(ABB &arbol, Datos &d ) { if(arbol==NULL) arbol = crearNodo( x ); else if( x < arbol->nro ) insertar(arbol->izq, x ); else if( x > arbol->nro) insertar( arbol->der, x ); } Ideally, a template should be made, but we leave it for another question
C++ vapouring line by number
Software Programming • c++ algorithm lines • • Demir

2

0
Votes

2
Posts

0
Views

R

As an option for a private case where there is no negative numbers, the numbers are divided by a gap:auto op = [](const char c) { return c != ' ' && !isdigit(c); }; auto last = std::remove_if(str.begin(), str.end(), op); std::istringstream is(std::string(str.begin(), last)); int n; while (is >> n) cout << n << ' ';
How do you break the date by number and time?
Software Programming • qt datetime • • inna

2

0
Votes

2
Posts

0
Views

E

#include <QCoreApplication> #include <QDateTime> #include <QDebug> int main(int argc, char *argv[]) { QCoreApplication a(argc, argv); const QString str = "2018:11:09T12:07:04.000"; auto d = QDateTime::fromString(str, Qt::ISODateWithMs); qDebug() << d.time().toString(); qDebug() << d.date().toString(); return 0; } Conclusion:"12:07:04." "Ap Nov. 9 2018"
K

How do you know the number of figures in the line?
Software Programming • c++ • • kalyn

2

0
Votes

2
Posts

0
Views

After the construction of the line, the cycle with each symbol checking the function isdigit();If isdigit() returns trueThen we'll increase the counter to the end of the line.
char[] or *char malloc?
Software Programming • c++ c language array memory ponteiro • • irl

2

0
Votes

2
Posts

0
Views

A

The first allocates 10 positions in memory (probably in stack, but depends on the context where it is being used) for a type char that in the case is guaranteed size of 1 byte. And this storage location will be called text.The second allocates memory in heap also for 10 type positions char (sizeof(char) is unnecessary). Function malloc() will return a pointer to the location of the allocated memory and this pointer can be stored in the variable (in case it was called char, but that name is invalid).The use of malloc() which is stored in heap allows the object to survive even after the function (or stack) finish. If you were allocated stack, it is destroyed at the end of stack where he was allocated. It can also be a problem for stack if the size to allocate is large or not easily determined as small.If you don't have one free() somewhere there will probably be a memory leak.In C++ we do not recommend using either.Complementary reading: https://pt.stackoverflow.com/q/3797/101 https://pt.stackoverflow.com/q/56580/101 https://pt.stackoverflow.com/q/120103/101 https://pt.stackoverflow.com/q/130792/101 https://pt.stackoverflow.com/q/95824/101 https://pt.stackoverflow.com/q/106719/101
A

How does C/C++ 'padding work?
Software Programming • c++ c language optimization struc languaget padding • • Anderson

2

0
Votes

2
Posts

0
Views

F

What isThis is used to facilitate the work of memory reading and placement in registers. Registered people work with a fixed size according to their architecture. The ideal is that the data falls within this size. Then the data is stored in https://pt.stackoverflow.com/q/185523/101 . O padding (or fill) aligns this data by adding Bytes not significant. The compilers do this by default. If you need specific behavior, it is necessary to use directives indicating the necessary way.For all effects classes are structures (structs) and work the same way.WasteIn your example the structure will probably have 12 Bytes (32-bit architecture) since the member b will be filled with 3 Bytes extras to make padding. So all members will have 4 bytes. This number is obtained taking into account that most architectures have a https://en.wikipedia.org/wiki/Word_(computer_architecture) with 4 Bytes in size.Evidently in 64-bit architectures the damage is even greater (and it is possible to have even greater fill), you can have up to 7 Bytes of waste. The word usually reflects how registered ones are used in processors. Note that I am using common data in the main architectures. C and C++ compilers are liberal as to the size of almost all types applying a minimum size.Eliminate padding can optimize in some cases memory consumption but can cause other performance issues. Read memory data in different sizes of the architectural word need extra processing. In most cases it does not compensate for the exchange.EconomizingOf course, there are cases that may be natural filling keeping the use of the word:struct { int a; char b; char c; char d; char e; float f; } This structure can very well have the same 12 Bytes. The 4 chars fit in the word alignment. So thinking the order of members can be quite useful.This is the most recommended way to solve the problem. It has no disadvantage for the software itself. Of course you will eventually have to put data in an order that is not so intuitive to read.Even in this case you will only have a clear memory consumption advantage if the structure is used repeatedly in another structure. Save some Bytes is not worth the effort. Save some Bytes multiplied by millions of times can make some difference.But it is also possible to control how padding is made with directives (often unstandardized between compilers). Example:When you really need it, we can do it packing. Examples in packaging.#pragma pack(1) In Microsoft C++, like others https://gcc.gnu.org/onlinedocs/gcc/Structure-Packing-Pragmas.html , makes the size in 1 ♪ actually eliminating any padding. Of course members with more than 1 byte will have their normal size. This indicates the minimum size the member must have. In GCC could use optionally:__attribute__((packed)) https://github.com/maniero/SOpt/blob/master/C/Struct/Packing.c .In this way it is reported that a specific member should not receive the padding. This is more flexible but can be insecure on certain platforms.Embedding members is risky and if you don't know exactly what you're doing you may have unexpected results. Well, almost everything in C and C++, but some resources are more risky.Even the considered standard form is not considered portable.Obviously we can use the operator sizeof to discover the actual size of the data. This operator always returns the exact size that the given occupies in memory and not the sum of its members. That is, he considers the filling.I stress that rarely these procedures are necessary. Almost always trying to package structures is premature optimization. By making the use of the structures less intuitive the recommendation is to avoid until it proves to be fundamental. https://en.wikipedia.org/wiki/Data_structure_alignment . http://www.catb.org/esr/structure-packing/ .
Breaking of lines on masses (C#)
Software Programming • c sharp • • Alberto

2

0
Votes

2
Posts

0
Views

Y

Why is it so hard? C# is a very simple language.var splitChars = new[] { ' ' }; // разбивать будем по пробелу var result = File.ReadLines("name.txt") // прочитали все строки .Select(s => s.Split(splitChars, 2)) // поделили каждую на 2 части .Select(parts => parts.Skip(1).SingleOrDefault()) // выбрали вторую часть .Where(p => !string.IsNullOrWhiteSpace(p)) // отсеяли пустые строки .ToList(); // и сохранили в список If you need a parameter to get a meaning, you'd better do that:Dictionary<string, string> config; // ... public void ReadConfig(string filename) { config = File.ReadLines(filename) .Select(s => s.Split(splitChars, 2)) .Where(parts => parts.Any()) // убрали пустые строки .ToDictionary(parts => parts.First(), parts => parts.Skip(1).SingleOrDefault()); } For the case of multiple values, the following may be done:Dictionary<string, List<string>> config; // ... public void ReadConfig(string filename) { config = File.ReadLines(filename) .Select(s => s.Split(splitChars)) // убрали "2"! .Where(parts => parts.Any()) .ToDictionary(parts => parts.First(), parts => parts.Skip(1).ToList()); }
J

Find the nearest numbers between the masses
Software Programming • python python 3.x massives • • Jolied

2

0
Votes

2
Posts

0
Views

S

If I understood the mission correctly, then on the other hand, should be searched in the second set for each of the first.res = int(a[0]) for x in a: bmin = min(b, key=lambda i: abs(i - x)) print(b.index(bmin),': ', bmin) 1 : 3 1 : 3 0 : 7 0 : 7
Break the number by component
Software Programming • python python 2.x number • • Alberto

2

0
Votes

2
Posts

0
Views

A

Of course, we can honestly count the residues from the division, etc., but it's easier to break to the symbols the line and then translate those symbols back into numbers. This is done in line two of the following program:a = 123456 b = map(int, str(a)) print b if len(b)==6: print "Happy" if b[0] + b[1] + b[2] == b[3] + b[4] + b[5] else "Unhappy" If you want to be honestly divided into 10, you can replace the second line of this program with this fragment:b = [] while a > 0: b.append(a % 10) a = a // 10 b = b[::-1] # так можно развернуть, если бы нам был важен порядок print b Now, on your programme text, there's a balance of 11 divisions. two = b%11 and five = c%11Although it would be right to split it by 10 and then take the rest of the division by 10 (two = (b // 10) % 10) You need to figure out where 11 came from because it's a very strange code.Supplement:If it is important that we support input cases a less than six-digits, one line may be changed:while len(b) < 6: # теперь в b заведомо будет 6 элементов I also recommend that the code be studied from a neighbouring response (jfs), as it has some interesting points.
How to break the line on the mass
Software Programming • php • • Marcee

2

0
Votes

2
Posts

0
Views

B

You'll be able to help. http://php.net/manual/ru/function.parse-str.php parse_str - Smart line variables$query = "title=hello+world&name=name&phone=777&email=mail@mail.ru&city=city&message=msg"; parse_str($query, $text); echo $text['phone']; // 777
Programme performance measurement accuracy
Software Programming • c++ visual c++ • • Bogopo

2

0
Votes

2
Posts

0
Views

C

In the end, time measurements were made through the operation. But at once, two features:1. If you're using..._rdtsc, you won't notice the migration between the kernels, which might be important. __rdtscp. Example:int cpuStart = 0, cpuFinish = 0; int64 start = 0, finish = 0; start = __rdtscp(&cpuStart); //код finish = __rdtscp(&cpuFinish); finish = finish - start; It's an approximate code, I'm sure I'm not.Accordingly, in order to look at the kernels that were computed, cout cpu. It's necessary to declare.2. Also, the nuance (and because of it, the question was implicitly raised). The function rand() did not produce accidental values in a manner and had to separate the file with these values.
E

SI methods in structures
Software Programming • c++ c language • • elysha

2

0
Votes

2
Posts

0
Views

E

It's clear that I.I. just has to declare functions before they're used, Yava, for example) Thank you all.

How do you break the char mass by number through the separator?

Suggested Topics

Create a function that accepts the mass of the numbers and returns the difference between the largest and lowest in the mass Software Programming • javascript fumes • • tahishae

No matching function for call to 'Class::Class()' Software Programming • c++ poo • • shizuka

Break the mass on the elements of the second set Software Programming • php • • gionna

How to make the node of a binary tree store in a single node, 4 variables? Software Programming • c++ binary trees • • kalena

C++ vapouring line by number Software Programming • c++ algorithm lines • • Demir

How do you break the date by number and time? Software Programming • qt datetime • • inna

How do you know the number of figures in the line? Software Programming • c++ • • kalyn

char[] or *char malloc? Software Programming • c++ c language array memory ponteiro • • irl

How does C/C++ 'padding work? Software Programming • c++ c language optimization struc languaget padding • • Anderson

Breaking of lines on masses (C#) Software Programming • c sharp • • Alberto

Find the nearest numbers between the masses Software Programming • python python 3.x massives • • Jolied

Break the number by component Software Programming • python python 2.x number • • Alberto

How to break the line on the mass Software Programming • php • • Marcee

Programme performance measurement accuracy Software Programming • c++ visual c++ • • Bogopo

SI methods in structures Software Programming • c++ c language • • elysha

Create a function that accepts the mass of the numbers and returns the difference between the largest and lowest in the mass
Software Programming • javascript fumes • • tahishae

No matching function for call to 'Class::Class()'
Software Programming • c++ poo • • shizuka

Break the mass on the elements of the second set
Software Programming • php • • gionna

How to make the node of a binary tree store in a single node, 4 variables?
Software Programming • c++ binary trees • • kalena

C++ vapouring line by number
Software Programming • c++ algorithm lines • • Demir

How do you break the date by number and time?
Software Programming • qt datetime • • inna

How do you know the number of figures in the line?
Software Programming • c++ • • kalyn

char[] or *char malloc?
Software Programming • c++ c language array memory ponteiro • • irl

How does C/C++ 'padding work?
Software Programming • c++ c language optimization struc languaget padding • • Anderson

Breaking of lines on masses (C#)
Software Programming • c sharp • • Alberto

Find the nearest numbers between the masses
Software Programming • python python 3.x massives • • Jolied

Break the number by component
Software Programming • python python 2.x number • • Alberto

How to break the line on the mass
Software Programming • php • • Marcee

Programme performance measurement accuracy
Software Programming • c++ visual c++ • • Bogopo

SI methods in structures
Software Programming • c++ c language • • elysha