I am seriously trying to learn more about C++_. I did add a new class to the constructor, just following an examples , and I do not understand why I am getting this error. My own add is duplicate of existing , working class, and I do no see why it does no like the pointer. m_serial(new QSerialPort(this), // sequence 1` st add HERE m_TAB_Ext(new A_BT_TAB_DIALOG_EXT) /mnt/A_BT_DEC10/A_APR13_APR15/A_APR9_MAR7_MAR19_CLEAN/A_BT_LIBRARY/terminal_Bluetooth/mainwindow_Bluetooth_copy.cpp:3088: error: called object type 'A_BT_TAB_DIALOG_EXT *' is not a function or function pointer mainw ..read more

I am using makefile / make DEFINES as common resource for project. DEFINES += define PORT_CONFIGURATION DEFINES += undefine SERIAL_SETUP DEFINES += define STATUS_BAR DEFINES += define TRACE_MENU DEFINES += define TEST_SERIAL_PORT DEFINES += define SERIAL_PORT_SETUP DEFINES # add Apr15 DEFINES += define DEBUG_MDI DEFINES += define TRACE_CONSOLE Is there a simple way to ERASE all DEFINES and start fresh? My code has few places of DEFINES and commenting them out is impractical. I did ask Mr Google , and the above did not work. Thanks ..read more

I have run out of options to resolve this in another forum. The "conclusion " was - it is a linker error... I am asking for help to actually correct the error. There are no other errors posted. This is ALL (of the errors ) I have to go by. I will be happy to provide RELEVANT info , barring " what are you trying to do...". I am deliberately NOT adding more info , for now, I just do not want to derail / influence your ideas of fixing it. lib/libQt5SerialPort.so /home/nov25-1/Qt/5.15.2/gcc_64/lib/libQt5Core.so -lGL -lpthread /usr/bin/ld: /usr/bin/ld: DWARF error: invalid or unhandl ..read more

Calling break inside nested for loops breaks all loops or just the inner loop where break is found? Do I need to do this to exit all loops? C++ bool breakouter = false; for(int x=0;x<count;x++) { for(int y=0;y<count;y++) { breakouter = true; break; } if(breakouter) break ..read more

If my preprocessor define / undefine code hierarchy is in this sequence: #define TEST #undefine TEST #define TEST assuming it is read "top to bottom " is "TEST" defined ..read more

Hi I have below code written while contesting on a platform, though I find working with code but it fails with different test cases especially when Input value is 1 and no string is provided. Can anyone please help to resolve this issue ? #include <bits stdc++.h=""> using namespace std; string reSize(string s) { if(s.length() > 0) { std::string res; int count =1; for(int i =0;i<(s.length() - 1);i++) { if(s[i] == s[i+1]) { count++; } else { res += s[i]; if(count > 1) { res += std::to_string(count); } count = 1; } } res += s[s.length() - 1]; if(count > 1) { res += std::to_st ..read more

Se desea realizar una aplicación para llevar el control de las producciones que tiene una brigada de estudiantes en una empresa de cultivos varios en el mes de noviembre, la tarea es la recogida de tomates. Es de interés para la empresa conocer. a-Cuantas cajas de tomates se recogieron al analizar el mes. b-En cuantos días la brigada cumplió la norma de producción. Tener en cuenta que la norma de producción es de 100 cajas. c-La cantidad máxima de cajas recogidas. d-La cantidad mínima de cajas recogidas. e-El promedio de cajas recogidas en el mes. f-Saber en cuantos días supero el promed ..read more

In C++ you have ints, variables for floating point numbers, bools. Does Assembly have the same variable differentiation? Can you move any type of variable into a register ..read more

Hi, as learning process, i need some code (or simple sample project) that shows how to post?send message from a library (dll) to application (dialog or console). If a thread in dll sends message to app, how is the best to approach that?. Using GetMessage ..read more

//TestDll2.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl NS::A::A(int (__cdecl*)(class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> >))" (__imp_??0A@NS@@QEAA@P6AHV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z@Z) referenced in function main =====file TestDll2.cpp===== C++ #include <iostream> #include "..\\MyDll\\MyDll.h" using namespace std; using namespace NS; int Print(string str); int main() { NS::A* a = new NS::A(Print); NS::printDlgt("Hello World!"); } int Prin ..read more