codeblocks

Order of constructor and destructor calling?

由 落花浮王杯 提交于 2020-01-06 15:04:30
问题 I cannot understand the order of constructor and destructor calls? What will execute first in this statement A b=f(a)? Can someone please help me out? #include<iostream> using namespace std; class A { int x; public: A(int val = 0) :x(val) { cout << "A " << x << endl << flush; } A(const A& a) { x = a.x; cout << "B " << x << endl << flush; } void SetX(int x) { this->x = x; } ~A() { cout << "D " << x << endl << flush; } }; A f(A a) { cout << " C " << endl << flush; a.SetX(100); return a; } int

Order of constructor and destructor calling?

由 孤者浪人 提交于 2020-01-06 15:04:28
问题 I cannot understand the order of constructor and destructor calls? What will execute first in this statement A b=f(a)? Can someone please help me out? #include<iostream> using namespace std; class A { int x; public: A(int val = 0) :x(val) { cout << "A " << x << endl << flush; } A(const A& a) { x = a.x; cout << "B " << x << endl << flush; } void SetX(int x) { this->x = x; } ~A() { cout << "D " << x << endl << flush; } }; A f(A a) { cout << " C " << endl << flush; a.SetX(100); return a; } int

Ubuntu配置CodeBlocks+opencv

由 佐手、 提交于 2020-01-06 01:39:55
Ubuntu 配置 opencv , CodeBlocks 开发环境 转自： 主要： http://blog.csdn.net/cenziboy/article/details/7570139 参考： http://blog.csdn.net/yr119111/article/details/7666106 一、安装CodeBlocks（我用的是方法一） 方法一：直接在Ubuntu软件中心中找到CodeBlocks软件，直接安装； 方法二：命令行安装 # apt-get install codeblocks # apt-get install codeblocks-contrib # wxWidgets 貌似要用 # apt-get install libwxbase2.8-dev # 还是 wxWidgets 的东东 二、安装opencv 1、 先查询opencv ~# apt-cache search opencv #输入此行命令，下面为系统查询结果 libcv-dev - Translation package for libcv-dev libcv2.3 - computer vision library - libcv* translation package libcvaux-dev - Translation package for libcvaux-dev

About stdafx.h missing in my compiler(mingw32 on windows)

由 心已入冬 提交于 2020-01-05 01:35:10
问题 I just have a quick question. I've noticed that I don't have stdafx.h in my compiler(mingw32 on windows) Am I supposed to have it? Or maybe is there a way to get around it? Thanks for reading EDIT: ok here is my current build log once I took out ALL of the includes of stdafx.h http://pastebin.com/bczLr8xY 回答1: Read this wikipedia article. The paragraph I linked and the paragraph below it (mingw32 uses GCC). http://en.wikipedia.org/wiki/Precompiled_header#stdafx.h Since stdafx.h contains the

How to clear the output screen in Code::blocks?

由 霸气de小男生 提交于 2020-01-04 13:06:53
问题 in turbo c++ you could do it like this #include<conio.h> void main() { clrscr(); } But in code blocks i cant use this.. :( 回答1: You can use system("cls"); with the header #include <cstdlib> . "cls" is a Batch command that works on DOS/Windows. On other systems(UNIX based systems) you might use: cout << "\x1b[2J\x1b[1;1H" << flush; Never, I repeat, NEVER use "conio.h". Is a deprecated library, that is not a part of standard, and only a few compilers have it. 回答2: Clear Output Screen - Depends

Turn off auto-complete for Code::Blocks

由 痞子三分冷 提交于 2020-01-03 17:26:47
问题 As I am typing in Code::Blocks, I would prefer to type code directly without having the editor insert closing parentheses and brackets. I chose the disable code-completion in Settings > Editor > Code Completion, but this feature does not disable auto complete features with closing characters. What is the right setting for turning off this feature in Code::Blocks? 回答1: "Settings -> Editor... -> General settings -> Indent options -> Brace completion" 回答2: I got it,How to disable the auto brace

project version in .exe-filename

由 纵饮孤独 提交于 2020-01-03 06:08:13
问题 I just tested the auto-versioning plugin and was wondering whether it is possible to put the project's version into the output exe's filename. So e.g. the output could look like this: myProject_0.11.8.exe Being able to have the compile-time-date in the filename would be nice aswell: myProject_2013_12_16.exe Is that possible? 回答1: You can add the following to the output filename variable: add $(TODAY) or $(NOW_) or $(NOW_L) , placing it between the end of the filename and the .exe part and you

project version in .exe-filename

由 淺唱寂寞╮ 提交于 2020-01-03 06:07:45
问题 I just tested the auto-versioning plugin and was wondering whether it is possible to put the project's version into the output exe's filename. So e.g. the output could look like this: myProject_0.11.8.exe Being able to have the compile-time-date in the filename would be nice aswell: myProject_2013_12_16.exe Is that possible? 回答1: You can add the following to the output filename variable: add $(TODAY) or $(NOW_) or $(NOW_L) , placing it between the end of the filename and the .exe part and you

project version in .exe-filename

由 微笑、不失礼 提交于 2020-01-03 06:07:01
问题 I just tested the auto-versioning plugin and was wondering whether it is possible to put the project's version into the output exe's filename. So e.g. the output could look like this: myProject_0.11.8.exe Being able to have the compile-time-date in the filename would be nice aswell: myProject_2013_12_16.exe Is that possible? 回答1: You can add the following to the output filename variable: add $(TODAY) or $(NOW_) or $(NOW_L) , placing it between the end of the filename and the .exe part and you

PCRE: Find matching brace for code block

由 ☆樱花仙子☆ 提交于 2020-01-02 05:54:13
问题 Is there a way for PCRE regular expressions to count how many occurrences of a character it encounters (n), and to stop searching after it has found n occurrences of another character (specifically { and } ). This is to grab code blocks (which may or may not have code blocks nested inside them). If it makes it simpler, the input will be a single-line string, with the only characters other than braces are digits, colons and commas. The input must pass the following criteria before code blocks
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