Beginners - C++ Forum - December 2022

Inheriting a Protected Field from a Base Class

I'm trying to implement my java assignment (it's working in java) to C++ but when I tried to inherit from the Animal class, Crocodile class' constructor says "c...

[5 replies] Last: Thanks for helping, I thought that C++ is inheriting fields like java.... (by bydrachen)

by gabzz29

nothing is happening in the terminal

every time i enter an int in the terminal nothing is happening , then after i spam a few int it will show result but its wrong #include <iostream> usi...

[4 replies] Last: Why have "Calculate again" at the end of every case? Why not have afte... (by seeplus)

by gabzz29

i need to keep entering in the terminal

when i put an int in terminal nothings happening, then after a few enter it will show result but the res is wrong #include <iostream> using namespace std;...

[2 replies] Last: Please don't double post: https://cplusplus.com/forum/beginner/285181/ (by kbw)

by mathman54

C++ by Deitel

HI All, I am writing code from the Book C++20. The code I write into VS Community 2022 works fine except that I have to change the language version. I have to ...

[4 replies] Last: So's I guess SWAG wasn't too intuitive either, eh? (by deleted account xyzzy)

by Jonathan100

debug strange behavior

Hi. Why my debugger doesn't go sequentially in the code? Sometimes it goes back (i am not talking about loops). and than continue. for example: iResult = s...

[3 replies] Last: Many compiler optimizations affect debugging. Consider using -Og -... (by Peter87)

by Jonathan100

Code meaning- structs and typecast

Hi. I have this code: struct SITAL_DEVICE_INTERNAL { SITAL_DEVICE_HANDLE hDevice; char UniqueDeviceName ; char DeviceID ; int Bars; SITAL_DEV...

[3 replies] Last: Thanks. i can give private access if someone would like. but i can't m... (by Jonathan100)

by AlexCantor

Error compiling .c program files using Visual C++ 2022

Need help compiling Encryption C program files downloaded from Github please: https://github.com/tbuktu/libntru Downloaded zip file has src folder with about 3...

[17 replies] Last: Thank you seeplus, for the excellent malloc idea. I will work on this... (by AlexCantor)

by PhysicsIsFun

2d vector default value in class header

Greetings, I would like to give a class member default values within the header file of the class, so that I don't have to write a .cpp file. // .h fil...

[16 replies] Last: @seeplus Yeah, I realized my mistake and removed my post before you ... (by Peter87)

by PhysicsIsFun

Send row of 2D vector with MPI

Greetings, I try to send the "row" of a vector of vectors with an mpi reduction operation, but I get a runtime error: A minimal example: #include <vector>...

[2 replies] Last: Thank you @lastchance. I forgot I had to use the first index of the i... (by PhysicsIsFun)

by gabzz29

Expression must be a modifiable lvalue

i got a problem at line 15, thank you for your kind heart. #include <iostream> using namespace std; int main (){ cout << "Simple Calculator: \...

[3 replies] Last: Thank you everyone that solved it (by gabzz29)

by Daniel Steel

How do I count the indexes of a dynamic class array

So, our professor tasked us with designing a code that will, basically, have a class "Course". This class will include a pointer char array CourseName, along wi...

[4 replies] Last: OK. But bare in mind that this isn't how you'd normally code it. A pos... (by seeplus)

by kakaducsy

#define in c++

How can I shorten macro as code bellow? i.e : DO_(n)(x) = DO_(n-1)(x),DO_(1)(x) Thank you #include <iostream> #define DO_1(x) &x #define DO_2(x) DO_1(x)...

[2 replies] Last: Perhaps you just need a recursive template. https://stackoverflow.com... (by salem c)

by AlexCantor

Merry Christmas to all C++ Developers

Wishing you the C++ developers Very, Very Merry Christmas. Many of you are great and extraordinarily talented C++ programming experts and have been helping m...

[2 replies] Last: Merry Christmas! (by Ganado)

by Jonathan100

Memory Overflow

Hi guys. In eclipse based Vitis, i got this error: c:/xilinx/vitis/2020.2/gnu/microblaze/nt/x86_64-oesdk-mingw32/usr/bin/microblaze-xilinx-elf/../../libexec...

[6 replies] Last: mb-g++ -Wl,--print-memory-usage Pass an option to the linker http... (by JLBorges)

by jNc

Program crushes after reaches x memory usage

How to release all memory related to current programm? Tried to re execute with atexit, but still having the same memory usage till manually close program

[4 replies] Last: If you use new, then use delete. if you use new , then use delete ... (by seeplus)

by Jonathan100

Unexpected compiling/linking errors

Hi guys! i am trying to compile some source codes in eclipse based Vitis. Unfortunately i am getting some errors - In previous projects with the same sourc...

[7 replies] Last: https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines has multi... (by keskiverto)

by jNc

How to output struct CHAR_INFO contains

How to output struct CHAR_INFO contains?

[8 replies] Last: > I'm struggling to save to string output from terminal The tee (betw... (by JLBorges)

by jNc

Improve building time

Have a lot of functions, which placed before main If I move it inside main, will it affect building time?

[6 replies] Last: Furthermore, separate compilation units can be compiled simultaneously... (by keskiverto)

by jNc

Get previous cout text to string

Need to get previous cout text to string. Need to keep cout for debug Tried sstring buffer, but it can replace cout