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by kitfox
How to use smart pointers to expose internal parts of a class?
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| I'm trying to figure out how to adapt code written using raw pointers to use smart pointers. I have several classes where one class (let's call it Alpha) conta... |
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Sep 30, 2020 at 7:57pm
[3 replies] Last: Smart pointers do not replace plain pointers -- that's a common misc... (by mbozzi)
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by kitfox
Best way to allocate a block of memory?
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| I want to allocate a large block of memory to store image data. It will be several kilobytes in size and is basically just a large block of bytes representing ... |
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Sep 30, 2020 at 3:29pm
[4 replies] Last: If you want to dynamically manage memory and don't want to use std::v... (by deleted account xyzzy)
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by SirEnder125
Is Java easy to learn after C++?
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| Hello. Does anyone know if Java (or, whatever the game 'Minecraft' is written in) is easy to learn after C++? I've only learned C++ so far when it comes t... |
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Sep 30, 2020 at 2:29pm
[9 replies] Last: the biggest problem I have with java after c++ is that there are a doz... (by jonnin)
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by SirEnder125
Reading hex offsets/data from ifstream file?
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| Hello. Can anyone tell me if it is possible to read a hex offset such as 0x00000001 (0x1??) Like in a hex editor??? Ummm... I guess that's my question. Thanks... |
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Sep 30, 2020 at 1:26pm
[3 replies] Last: int offset; mystream.read((char*)&offset, sizeof(offset)); // if th... (by dhayden)
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by Borneq
Odd template
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| In type_traits I can see: // [func.require] paragraph 1 bullet 1: struct __result_of_memfun_ref_impl { template<typename _Fp, typename _Tp1, typename...... |
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Sep 30, 2020 at 11:00am
[2 replies] Last: To explicitly answer each of these: std::declval is a function, so th... (by MikeyBoy)
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by SirEnder125
#ifndef include guard help!
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| Hello. I am new to using #ifndef, #ifdef, #endif and such. I put the following at the top of my header file: #ifndef INCLUDE_H #define INCLUDE_H And an #end... |
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Sep 30, 2020 at 4:18am
[13 replies] Last: Problem solved. Thank you all for helping!! (by SirEnder125)
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by its007
Filling 3-d array with random number with conditions
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| Hello all, First off, I would like to thank you for reading this. I am grateful for any help/hints I can get. I have a dynamically allocated 3-d array (ex: ar... |
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Sep 30, 2020 at 2:02am
[5 replies] Last: Thank you jonnin and coder777! I appreciate the help much very much. ... (by its007)
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| Manipulating an array (creating destructor, shifting elements forward/back and printing the array) |
| Need help finishing up the yet to be defined functions in this chunk of code. #include <iostream> using namespace std; // You need to define the functions rem... |
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Sep 30, 2020 at 1:20am
[1 reply] : moveTowardEnd( index ) { /* s = size WHILE s > index : ... (by nuderobmonkey)
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by SirEnder125
User input after *argv[] input
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| Hello. I would like to know how to get a file name input into int main(int argc, char *argv ) Like the user inputs: --file text.txt and a file is made c... |
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Sep 29, 2020 at 7:25pm
[8 replies] Last: Thank you. I'll try to remember all this stuff... I should have learn... (by SirEnder125)
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by Flashbond
Certain input value causing crash
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| Dear Users, The code blow keeps craching for input 15. I thought it was some Windows 7 issue. Then I installed a fresh copy of Windows 10. But still the exe ke... |
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Sep 29, 2020 at 4:36pm
[5 replies] Last: Change to int* p = new int ; p = 2, p = m; works ok on my win... (by seeplus)
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by SirEnder125
C++ code for reading text from file? (help)
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| Hello. I was wondering if anyone could tell me how to do this. Read the text after the inputted label from this file: input.txt Msg1::"Hello world!" ... |
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Sep 29, 2020 at 2:13am
[4 replies] Last: just do getlines and discard the ones you do not want to skip a line o... (by jonnin)
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by JUANDENT
Does destructor of a polymorphic base class that is protected need to be virtual?
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| If I have a base class for an inheritance tree, and the destructor is declared protected, do I still need to define this method as virtual? Why if I am not goin... |
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Sep 28, 2020 at 8:28pm
[3 replies] Last: thanks!! (by JUANDENT)
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by souleaterdm1
How do I use a boolean vector with if-else?
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| Let me explain exactly what I mean. I've got a recursive function that works with roughly the following pseudocode int funct (vectorlist1, param2, ..., vector... |
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Sep 28, 2020 at 7:30pm
[1 reply] : .at is notably slower than notation because it checks i to be valid.... (by jonnin)
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by jerryd
wofstream problem
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| cplusplus forum, Windows 7, MS VS 2017, C++ I have a wstring that contains a unicode character and want to use it as a file name. wstring = filep... |
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Sep 28, 2020 at 12:05am
[7 replies] Last: cplusplus forum, I was able to find a way to create a windows file na... (by jerryd)
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by SirEnder125
What does ^= mean and how do I use it?
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| I've seen this operator in c++ codes and I don't know what it means. Thanks for answers in advance. |
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Sep 27, 2020 at 7:40pm
[4 replies] Last: Ah, thanks for explaining this. I'll try using this in my code. (by SirEnder125)
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by SirEnder125
Encryption code not working
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| Hello. Can anyone here tell me why this code won't work (you can run it to see what I mean) #include <include.h> #include <encrypt.h> int main() { char a; ... |
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Sep 27, 2020 at 3:48am
[2 replies] Last: I figured out what was wrong, I should have done: data = encrypt(dat... (by SirEnder125)
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by JUANDENT
How to combine hash values using std::hash
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| I have a type with 2 int data members. I want to calculate a GOOD hash value and since std::hash exists I thought I would use it - after all it must be GOOD to ... |
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Sep 26, 2020 at 9:45pm
[12 replies] Last: perfect hashing is usually reserved for a static set of known data suc... (by jonnin)
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by kingjulian
my compiler says expected primary expression before '<<'
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| #include <string> #include <fstream> using namespace std; struct TempScale { double fahrenheit, centigrade; }; struct Reading { int windSpeed; ... |
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Sep 26, 2020 at 8:03pm
[2 replies] Last: You're also attempting to use the name of a class as if it were an obj... (by Ganado)
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by AmirRN
Why const reference string
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| Hi everyone, I just wrote this piece of code to test something, but it didn't go through the GCC-compiler because of the following error: C:\Project\TESTS\QtC... |
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Sep 26, 2020 at 2:22pm
[1 reply] : is not why you need a const reference, but why do you need a non-const... (by ne555)
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by Depressed
Eight Queens Problem 2-D Array Help
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| Hi I am currently trying to work on creating a function where it determines if a queen is under attack by another queen and returns if there is a queen in the ... |
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Sep 26, 2020 at 8:36am
[1 reply] : TBH, the whole idea of storing the row in a 'Queen' object, and the co... (by salem c)
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