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General C++ Programming - January 2018 (Page 4)

This is my first time with C++ and only a week in and my teacher goes way to fast!! and has already assigned us homework, please help me. Thank you! I need to...

[1 reply] : well, a design isn't code. Try extending the text above a little to e... (by jonnin)

by Volundr

Turning on lights

Hello, I am about to embark on a project where I use code to turn on a light switch. So far what I have gathered is that I need to create a class that send out ...

[1 reply] : first is to figure out exactly how you will flip the switch... you ne... (by jonnin)

by Osmium

Strange error with gsl_matrix_complex type

Dear community, when using the following code: #include <gsl/gsl_linalg.h> #include <iostream> #include <gsl/gsl_complex.h> using namespace std; ...

[2 replies] Last: Ok, thanks for the answer, I'll check this. (by Osmium)

by jono ava

Checking if user input is a number or character

Hey guys, Does anyone know how to write a programme that checks if the users input is a number or is alphabet, im new to c++ and am trying to make a program...

[5 replies] Last: > You need to clear the rest of the line whether the input is good or ... (by JLBorges)

by fewdiefie

Which one is better?

Hello guys, I am beginning directX 11 game developement and I think I need a book so i asked many people and they always refer me to "Practical rendering and co...

[no replies]

by dailydols

crashing allocator for std.:unordered_map

When trying to invoke a custom templated PoolAllocator<T> for std::unordered_map<T>, I get segfaults when accessing the map with the operator . Using this alloc...

[5 replies] Last: I have a rebind, which should explain why std::map works and using the... (by dailydols)

by Chilli Mustard

Why cannot i use (==) or (>=) in Xcode?

I do not know why i cannot use == or >= on Xcode on mac to the this simple code. #include <iostream> #include <string> using namespace std; int main(){ ...

[2 replies] Last: Thank you very much keskiverto. I fixed the error, with your clarifica... (by Chilli Mustard)

by SSteven

Does money_get<> work correctly?

On coliru, I have tested the money_get <> facet for USD and EUR. It works correctly (as far as my test data was concerned) for USD, for not for EUR. The prog...

[6 replies] Last: As mentioned on cppreference page for std::money_get::get, std::showba... (by sm2345110)

by RanjitMuktapuram

How to iterate two vectors at the same time in For LOOP

Hi all, I have a issue where two different vectors has to iterate at same time. Basically to say i have ZIP_Iteration problem with two vectors. I tried to ...

[3 replies] Last: What you want is an up-and-coming feature of C++17 compliance that eve... (by Duthomhas)

by WiWo

Late binding in a list

I'm using a list to store objects of different classes, which have a common base class. Moreover when I access directly an element of the list, I need to use la...

[2 replies] Last: Thanks a lot. I thought this would have not worked because in my proj... (by WiWo)

by afedorov

Google Mock and pointers in the test

Hi Could someone explain me what is going on in this test: SimpleTest.h #include "gmock/gmock.h" class SimpleTest : public ::testing::Test { protected: ...

[3 replies] Last: Could you explain what do you mean by "leak". When an invocation of ... (by cire)

by jono ava

C++ Input verification

Hey guys, Does anyone know how to write a programme that checks if the user's input is a number or is alphabet, I'm new to c++ and am trying to make a progr...

[5 replies] Last: #include <iostream> #include <string> #include <cctype> using namespa... (by lastchance)

by jono ava

BITCOIN C++

hey guys, I was wondering if anyone knew how to write a simple programme on bitcoin and how it works, such as hashes, Blockchain, transactions, private keys a...

[no replies]

by warduty1797

Removing White Spaces

Guys I'm doing an Scanner for a compiler so i'm testing the basic read, deleting and write in a separate file. This piece of code is to test the erasing of a w...

[5 replies] Last: > I'm doing an Scanner for a compiler We can't just remove (or ignore... (by JLBorges)

by jono ava

BITCOIN - CRYPTOCURRENCY

Hello guys, I am really interested in bitcoin and cryptocurrency and I just found out that bitcoin was written in C++, does anyone know how to write a simple...

[no replies]

by jono ava

Limited Login Attempts

Hello c++ programmers, Im a beginner in c++ and im trying to make a programm that will close after you get the password and or username wrong 3 or more times, d...

[4 replies] Last: @Ganado - Really good feedback, thanks sir👍 (by jono ava)

by jono ava

C++ User input verificartion

Hello C++ programmers, I am finding it difficult to write a programme in C++ that automatically knows whether you have inputted 1 or more numbers. I want the...

[9 replies] Last: Thanks for that, really helpful👍 (by jono ava)

by Bonbonnns

storing a json object in a vector

Hi guys, I have a question. I am working with a json file for the first time, and I am trying to store the contents of it into a vector pass it to a sorting fu...

[1 reply] : One problem is this: std::vector<int>data ; // This is not filled std... (by coder777)

by afedorov

Fields in the test class are not visible. Google Test, CLion

I am writing unit test in CLion with Google Test Test.h #include <gtest/gtest.h> class CycleTest : public ::testing::Test { protected: void SetUp() { ...

[1 reply] : To use a test fixture, replace the macro TEST with TEST_F. The interf... (by mbozzi)

by calincalc2018

Problem using STL library (-map)

Please can you help me with this problem that uses the STL Library(-map): Create a string of n people, name and age. Calculate the average age of all people in...

[3 replies] Last: If you have the input data is a text line consisting of name and age t... (by AlexCantor)

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