c++

问题 I've been using Boost with my project for a while now, though until now, I'd only used the header-only libraries. I now want to use serialization, but when I try to add serialization as a REQUIRED component, I get the error written in the title. Here is my CMAKE file: cmake_minimum_required(VERSION 3.15) project(GinRummyCPP) SET(CMAKE_INCLUDE_PATH ${CMAKE_INCLUDE_PATH} "D:/Program Files/boost/boost_1_73_0") SET(CMAKE_LIBRARY_PATH ${CMAKE_LIBRARY_PATH} "D:/Program Files/boost/boost_1_73_0/libs

问题 I have an XML file that I need to parse and I'm struggling with using PugiXML to parse out all elements and attributes. I have the following XML file: <?xml version = '1.0' encoding = 'UTF-8'?> <PanelList DefaultTheme="konami" > <Panel xpos="0" ypos="0" width="800" height="600" imagepath="./%THEME%/background_uga_large.png" name="AttractMode0" > <GameViewport xpos="0" ypos="0" width="630" height="526" name="gameviewport"/> <ValueLabel xpos="120" ypos="550" width="448" height="30" fontsize="18

问题 How to detect memory overrun in your 24/7 application, such as an online game server? The system and tool is linux + gcc. Sometimes the cause of the memory overrun is writing the memory beyond the array; and sometimes the cause of the memory overrun is invalid pointers. So, does anyone have some experience with this and know how to prevent it? 回答1: Prevention (at code level): Watch out the warnings of your compiler Use a static code checker Use strong coding guidelines Detection (at run-time)

问题 I need to detect a keypress in a console application, without prompting the user. Basically, my app is normally a daemon that listens to a special input device, but i need to simulate it on a dev box using the keyboard in interactive mode. How can I do this? - Im on a Linux system. 回答1: If you can't block while waiting for input, then you can use e.g. select to check if the STDIN_FILENO file descriptor is ready for reading, and if it is then you can use normal input functions ( scanf , fgets

问题 I need to detect a keypress in a console application, without prompting the user. Basically, my app is normally a daemon that listens to a special input device, but i need to simulate it on a dev box using the keyboard in interactive mode. How can I do this? - Im on a Linux system. 回答1: If you can't block while waiting for input, then you can use e.g. select to check if the STDIN_FILENO file descriptor is ready for reading, and if it is then you can use normal input functions ( scanf , fgets

问题 I need to detect a keypress in a console application, without prompting the user. Basically, my app is normally a daemon that listens to a special input device, but i need to simulate it on a dev box using the keyboard in interactive mode. How can I do this? - Im on a Linux system. 回答1: If you can't block while waiting for input, then you can use e.g. select to check if the STDIN_FILENO file descriptor is ready for reading, and if it is then you can use normal input functions ( scanf , fgets

问题 I am finding trouble linking a library in C++. I am trying for the first time to use "matplotlibcpp.h". This is a library that uses "Python.h" My code is not using either of the libraries yet. It gives error just by including "matplotlibcpp". I am using python2.7 and Ubuntu 18.04 and am using Eclipse. The code does not run if I include: #include "matplotlibcpp.h" // programme runs if this is commented out. But I need it to add new features. #include "Python.h" I have added these paths in

问题 I am finding trouble linking a library in C++. I am trying for the first time to use "matplotlibcpp.h". This is a library that uses "Python.h" My code is not using either of the libraries yet. It gives error just by including "matplotlibcpp". I am using python2.7 and Ubuntu 18.04 and am using Eclipse. The code does not run if I include: #include "matplotlibcpp.h" // programme runs if this is commented out. But I need it to add new features. #include "Python.h" I have added these paths in

问题 I am reading a file like this: char string[256]; std::ifstream file( "file.txt" ); // open the level file. if ( ! file ) // check if the file loaded fine. { // error } while ( file.getline( string, 256, ' ' ) ) { // handle input } Just for testing purposes, my file is just one line, with a space at the end: 12345 My code first reads the 12345 successfully. But then instead of the loop ending, it reads another string, which seems to be a return/newline. I have saved my file both in gedit and

问题 I am reading a file like this: char string[256]; std::ifstream file( "file.txt" ); // open the level file. if ( ! file ) // check if the file loaded fine. { // error } while ( file.getline( string, 256, ' ' ) ) { // handle input } Just for testing purposes, my file is just one line, with a space at the end: 12345 My code first reads the 12345 successfully. But then instead of the loop ending, it reads another string, which seems to be a return/newline. I have saved my file both in gedit and