What I know is a function signature is its name and parameters types. And it's what is important for overload, and it not consider the return type. A declaration is everthing considering the return type, and is something I don't have here

It's a non-correct function call The correct one would be fun(Complex{})

Look at the function call that you mentioned, we have a type declared, this is what I think it's a signature

Look at the function call that you mentioned, we have a type declared, this is what I think it's a signature

Please read carefully the original message > and he calls it like > fun(Complex calculator{}) It is a function call that has been written with a mistake, not something else

Please read carefully the original message > and he calls it like > fun(Complex calculator{}) It is a function call that has been written with a mistake, not something else

Thank you, I'm seeing this now he explicitly mentioned he is calling a function and not seeing it before.

Thank you, I'm seeing this now he explicitly mentioned he is calling a function and not seeing it before.

She*

She*

Ok, sorry. She.b

It's a non-correct function call The correct one would be fun(Complex{})

Actually I used the same type that OP used: "ComplexCalculator" but auto correct changed it to "Complex calculator"

Greeting everyone! I have a question related to macro in c++. As an example in a header file I defiened a macro named TABLE type of std::map<string, int> with some initial values. So when using this macro in other part of my program could that be a bottleneck for performance and space? I had the idea becuase a macro is replaced by the preprocessor.

Greeting everyone! I have a question related to macro in c++. As an example in a header file I defiened a macro named TABLE type of std::map<string, int> with some initial values. So when using this macro in other part of my program could that be a bottleneck for performance and space? I had the idea becuase a macro is replaced by the preprocessor.

Do NOT use macros to create type aliases Use type aliases https://en.cppreference.com/w/cpp/language/type_alias

Do NOT use macros to create type aliases Use type aliases https://en.cppreference.com/w/cpp/language/type_alias

I wanted the map to be constant and accessible thats why I did that! let me send you a sample

It does not make any sense

And your assumption, to be honest, is non-sense. Please do not try optimize just because you think it might be a performance problem The correct loop for optimization is: Write code -> Google how to benchmark software -> benchmark software -> find unoptimized functions -> find problems in them and fix

And your assumption, to be honest, is non-sense. Please do not try optimize just because you think it might be a performance problem The correct loop for optimization is: Write code -> Google how to benchmark software -> benchmark software -> find unoptimized functions -> find problems in them and fix

Yeah thats why I am asking if got the idea right.

Greeting everyone! I have a question related to macro in c++. As an example in a header file I defiened a macro named TABLE type of std::map<string, int> with some initial values. So when using this macro in other part of my program could that be a bottleneck for performance and space? I had the idea becuase a macro is replaced by the preprocessor.

if your goal is some table with values to be accessible everywhere, why don't you just make a single static instance

ho guys whats use of learning program when chatgpt script can send anything?

Hey man what have I done?

the offline trained llm for guided programmatic use

Hey man what have I done?

Read the rules for god's sake

Read the rules for god's sake

Thanks! God bless you.

Greeting everyone! I have a question related to macro in c++. As an example in a header file I defiened a macro named TABLE type of std::map<string, int> with some initial values. So when using this macro in other part of my program could that be a bottleneck for performance and space? I had the idea becuase a macro is replaced by the preprocessor.

inline const std::map<Key, Value> my_map = { {"The answer", 42} }; Place similar to your need line in one header file and then include where you need the object

inline is essential here, const is also Do not use global variables unless they are constants

Do not use preprocessor for this stuff

Okay thanks!

Okay thanks!

I removed the warning because you're a sane person

I removed the warning because you're a sane person

Again thanks!

#include<iostream> using namespace std; int main() { int year = 0,month = 0, yearLeap = 0, days = 0; cout << "What year is it?\n"; cin >> year ; cout << "What Month is it?\n"; cin >> month; //Judge leap year or not if((year%4 == 0) && (!year%100 == 0) && (year%400 == 0)) { yearLeap = 1; cout << "This is a Leap year!\n"; } else { yearLeap = 0; cout << "This is an ordinary year!\n"; } //Judge what kind of month if(month == 1 or month == 3 or month == 5 or month == 7 or month == 8 or month == 10 or month == 12) { days = 31; cout << "There are " << days << " Days in that month."; } else if(month == 4 or month == 6 or month == 9 or month == 11) { days = 30; cout << "There are " << days << " Days in that month."; } else if(yearLeap == 1) { days = 29; } else days = 28; return 0; }

Greetings everyone, this is a code I wrote and I have a question. At the "Judge leap year or not" part, how did the logic test go right when !year%100 ==100 should be a paradox with year%400 ==0

Greetings everyone, this is a code I wrote and I have a question. At the "Judge leap year or not" part, how did the logic test go right when !year%100 ==100 should be a paradox with year%400 ==0

Isn't leap years are multiple of 4 ?

Ya but I heard that leap year is 4n and not 100n, but 400n

Ya but I heard that leap year is 4n and not 100n, but 400n

if (year % 400 == 0) yes else if (year % 100 == 0) no else if (year % 4 == 0) yes else no Just implemented it from wikipedia

Thank you, but I'm still wondering is this : if((year%4 == 0) && (!year%100 == 0) && (year%400 == 0)) the same as: if (year % 400 == 0) yes else if (year % 100 == 0) no else if (year % 4 == 0) yes else no

Thank you, but I'm still wondering is this : if((year%4 == 0) && (!year%100 == 0) && (year%400 == 0)) the same as: if (year % 400 == 0) yes else if (year % 100 == 0) no else if (year % 4 == 0) yes else no

Should be (year % 400 == 0 || year % 100 != 0) && year % 4 == 0 I think

OK!!!Thank you so much!😆

OK!!!Thank you so much!😆

You should check the bigger value first because small value can be factor of the bigger one but not the opposite.

#include<iostream> using namespace std; int main() { int year = 0,month = 0, yearLeap = 0, days = 0; cout << "What year is it?\n"; cin >> year ; cout << "What Month is it?\n"; cin >> month; //Judge leap year or not if((year%4 == 0) && (!year%100 == 0) && (year%400 == 0)) { yearLeap = 1; cout << "This is a Leap year!\n"; } else { yearLeap = 0; cout << "This is an ordinary year!\n"; } //Judge what kind of month if(month == 1 or month == 3 or month == 5 or month == 7 or month == 8 or month == 10 or month == 12) { days = 31; cout << "There are " << days << " Days in that month."; } else if(month == 4 or month == 6 or month == 9 or month == 11) { days = 30; cout << "There are " << days << " Days in that month."; } else if(yearLeap == 1) { days = 29; } else days = 28; return 0; }

Why using namespace std? Isn't that bad practice?

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Why using namespace std? Isn't that bad practice?

It's too late to prevent it

Time to make perfumes: N no. of perfume bottle P.q.r are machines to make distilled and fragrance and another. t1. 12. 13 are times of machine Find the time take to n bottles of perfumes

please make this question

please make this question

$1000 is the cost

Time to make perfumes: N no. of perfume bottle P.q.r are machines to make distilled and fragrance and another. t1. 12. 13 are times of machine Find the time take to n bottles of perfumes

Time to make perfumes: N no. of perfume bottle P.q.r are machines to make distilled and fragrance and another. t1. 12. 13 are times of machine Find the time take to n bottles of perfumes

I'm waiting for 1000$ in bitcoins on my account

Time to make perfumes: N no. of perfume bottle P.q.r are machines to make distilled and fragrance and another. t1. 12. 13 are times of machine Find the time take to n bottles of perfumes

If you would be so nice, and read the rules you accepted, it would be appreciated

#include<iostream> using namespace std; int main() { int a=2; int y=++a * ++a; cout<<a<<" "<<y; }

Read the rules about allowed languages

Read the rules about allowed languages

its c++, so you are basically right

its c++, so you are basically right

I meant the non English text?

Read the rules about allowed languages

Oh sorry for that

#include<iostream> using namespace std; int main() { int a=2; int y=++a * ++a; cout<<a<<" "<<y; }

Why its output is 4 16

Why its output is 4 16

Your question explains why you or anyone else should never write code like that which is complicated to understand.

Why its output is 4 16

Because you do Int y = 4*4;

Your question explains why you or anyone else should never write code like that which is complicated to understand.

It is asked in interview of our college placement

#include<iostream> using namespace std; int main() { int a=2; int y=++a * ++a; cout<<a<<" "<<y; }

This is Undefined Behavior. This has been explained many times before in this forum. Either search for it or read about "Order of Evaluation" in Cppreference

ifstream inputFile("sample_data.csv"); if (!inputFile) { cerr << "Failed to open sample_data.csv" << endl; return; } string line; while (getline(inputFile, line)) { istringstream iss(line); string token; while (getline(iss, token, ',')) { uint8_t pixelValue = stoi(token); write(pipe_fd, &pixelValue, sizeof(uint8_t)); // Sleep for 'T' milliseconds to emulate the time interval this_thread::sleep_for(chrono::milliseconds(T)); } } inputFile.close(); exit(0); }

//output what i get Enter the number of columns (m): 10 Enter the scan width: 2 Enter the time interval (T) in milliseconds: 10 Enter the threshold value: 90 Select data source: Generate random data Use sample 2D array from a CSV file Enter your choice (1 or 2): 2 Pixel Value: 10 Filtered Value: 0 Threshold Value: 0 Lovelys-MacBook-Air:CynLr lovel$ Pixel Value: 20 Filtered Value: 0 Threshold Value: 0 Pixel Value: 30 Filtered Value: 0 Threshold Value: 0 Pixel Value: 40 Filtered Value: 0 Threshold Value: 0 Pixel Value: 50 Filtered Value: 4 Threshold Value: 0 Pixel Value: 60 Filtered Value: 10 Threshold Value: 0 Pixel Value: 70 Filtered Value: 20 Threshold Value: 0 Pixel Value: 80 Filtered Value: 30 Threshold Value: 0 Pixel Value: 90 Filtered Value: 40 Threshold Value: 0 Pixel Value: 15 Filtered Value: 50 Threshold Value: 0 Pixel Value: 25 Filtered Value: 59 Threshold Value: 0 Pixel Value: 35 Filtered Value: 69 Threshold Value: 0 Pixel Value: 45 Filtered Value: 72 Threshold Value: 0 Pixel Value: 55 Filtered Value: 62 Threshold Value: 0 Pixel Value: 65 Filtered Value: 42 Threshold Value: 0 Pixel Value: 75 Filtered Value: 32 Threshold Value: 0 Pixel Value: 85 Filtered Value: 35 Threshold Value: 0 Pixel Value: 95 Filtered Value: 45 Threshold Value: 0 //for some reason after reading the sample_data.csv, it prints the present working directory and then it is all same, how to not have the pwd in the output, someone please help

notice the Lovelys-MacBook-Air:CynLr lovel$in the ouput that is pwd which i do not want in the ouput, any suggestions

am i doing something wrong in reading the csv file

// Define the filter window double filterWindow[] = {0.00025177, 0.008666992, 0.078025818, 0.24130249, 0.343757629, 0.24130249, 0.078025818, 0.008666992, 0.00025177}; int filterSize = sizeof(filterWindow) / sizeof(filterWindow[0]); vector<uint8_t> buffer(filterSize, 0); int final_val = 0; while (true) { // Read data from the pipe (data generation process) uint8_t pixelValue; ssize_t bytesRead = read(pipe_fd, &pixelValue, sizeof(uint8_t)); if (bytesRead == sizeof(uint8_t)) { // Add the new pixelValue to the buffer buffer.push_back(pixelValue); // Check if the buffer has enough data for filtering if (buffer.size() >= filterSize) { // Apply the filter double filteredValue = 0.0; for (int i = 0; i < filterSize; ++i) { filteredValue += buffer[i] * filterWindow[i]; } if (filteredValue > threshold){ final_val = 1; } else{ final_val = 0; } // Output the filtered value cout << "Pixel Value: " << static_cast<int>(pixelValue)<< " Filtered Value: " << static_cast<int>(filteredValue) << " Threshold Value: " << final_val << endl ; // Remove the oldest pixelValue from the buffer buffer.erase(buffer.begin()); } } // Sleep for a while before processing the next batch this_thread::sleep_for(chrono::milliseconds(1000)); } }

this is the function that prints value for further reference

HI guys, I had made my whole background using C and C++, and I love this language, when you start realize how everything work, memory and arrays, pointers and other things, is just amaze how you start understand computer and program languages like C++. But In Brazil I had only one job working with C++, most of my Job in the last 5 years are using Java or C#, and my knowledge start become out of date, sometimes I take some task to do using C++, but the are small projects or integrations. I'm studying modern C++ and focus in high performance systems. I had understand what is move semantics and copy, the problem is, when data structure in C++ use them, like. If I'm using a vector and this vector resize, I know this will internally use move semantics to resize and move the old values, If I use emplace_back and need create specific constructors to be used by emplace_back, or it can just use move semantics and avoid the use of emplace_back. I'm studying and looking for every peace of information, so if anyome can help me sending articles or more source of information. I'll appreciate that.

C++ keywords, features, sintaxe and OOP are not a problem for me , I'm trying understand deeply c++ data structures.

Here I give some import YouTube and articles for c++ improvement I personally feel c++ is fast and high performance language giving high amount of control at hardware level believe this will help you

https://youtube.com/playlist?list=PL1tk5lGm7zvSoZ_u9U_mkI5Bss45bGCyv&si=8qGHlSBfAERbmtds

https://youtube.com/playlist?list=PLkEldc5soqvRcoiSViztJy9dlwYoV8S2t&si=y-Zbx9O2IH9ZTWpb

https://people.cs.pitt.edu/~xianeizhang/notes/cpp11_mem.html

https://hackingcpp.com/cpp/educational_videos.html#retro-compilers

https://github.com/RedSkittleFox/cpp-learning-resources/blob/master/README.md#embeding-different-languages-in-c

https://youtube.com/playlist?list=PLkEldc5soqvRcoiSViztJy9dlwYoV8S2t&si=y-Zbx9O2IH9ZTWpb

This doesn't seem like a quality course

This is basic but it gives exposure

Well I believe, but I may be wrong I am an undergraduate

Here I give some import YouTube and articles for c++ improvement I personally feel c++ is fast and high performance language giving high amount of control at hardware level believe this will help you

thank you, the problem is not the concept, is the usage in standard library, I'll check your links.

Try cppnuts YouTube channel

Try cppnuts YouTube channel

Do not

We recommend sticking with the Resources channel

We recommend sticking with the Resources channel

Ok, I'll look the resources channel.

Random YouTube channels, especially Indian ones, are considered harmful by default

thanks but i felt he had a great depth in his video after cherno

again, something not useful to you may be useful to others

Ok, I'll look the resources channel.

Also, UFMG university in Brazil has a nice laboratory on compilers, maybe they have a good C++ course and other