stl - c/c++ Questions about binary operations (by the way, looking for good libraries and methods)

I am currently working on a project involving content compression, which requires the data to be processed in ...

From [C++discussion group] 2017-06-05 11:11:09 0  2  791

C++ 程序出现error: cannot allocate an object of abstract type

一个基类，基类里面有个虚函数，一个子类实现了这个虚函数，但是在new这个子类的时候报如上题目这样的错误。

From [C++discussion group] 2017-04-17 11:19:42 0  1  791

c++怎么判断20道选择题的对错？

write a program to grade a multiple-choice exam. The exam has 20 questions, each answered with a letter in the...

From [C++discussion group] 2017-04-17 14:52:10 0  1  789

c++ - windows系统在睡眠/休眠时会像进程发消息吗？

我有个服务程序，在windows睡眠唤醒后，程序就运行异常。系统在睡眠时会暂停我的服务程序吗？会给我程序发送消息吗？谢谢提前感谢回答。

From [C++discussion group] 2017-04-17 14:44:09 0  0  789

dev-c++ - c++入门小白，刚学习c++,遇到一个问题。

在dev-c++中输入了system("pause"),输出的时候为什么没有"press any key to continue"呢？

From [C++discussion group] 2017-04-17 14:20:55 0  1  789

How to interpret this semaphore?

What exactly does the lock function here mean? ? Why is sembuf.sem_op -1 instead of 1 when unlocked? ?

From [C++discussion group] 2017-06-07 09:24:21 0  1  788

重载操作符 - c++中操作符重载需要写多种重复版本（引用与右值引用），有无方法可以简化

例如： {代码...} 有无什么方法可以简化这一大串？

From [C++discussion group] 2017-04-17 15:38:40 0  2  787

[C++] 关于stringstream ss.fail()的问题

{代码...} 假如getline读入了1 2 3 4, 这段代码运行结束后, i的值为5. 这是为什么? 请问ss.fail()是以什么来判断的?

From [C++discussion group] 2017-04-17 13:29:48 0  1  787

C++的函数关键字const的疑问

先说一下引用调用 C++有这样一段代码 {代码...} 这里面的 & 表示是引用调用，也就是直接将实参传到函数，而不是将实参拷贝给形参，然后形参传进函数，所以这样的方式可以更改实参的值。 C++中有关键字...

From [C++discussion group] 2017-04-17 12:06:43 0  3  787

c++ - What is the specific implementation of this reserved by library placement?

{Code...} I encountered it when I was learning various forms of operator new (c++ primer didn’t explain much),...

From [C++discussion group] 2017-05-16 13:30:16 0  1  786

关于C++模板实参推断的疑问

在C++ Primer中第16章第5节有讲到： {代码...} 为什么decltype(i)是int&，难道不应该是int吗？这好像与C++ Primer第二章讲decltype时说的不一样啊？

From [C++discussion group] 2017-04-17 15:25:58 0  1  786

How to understand `#define` with parameters?

part1 {code...} part2 {code...} is usually {code...}, but here we see it is {code...}. I underlined it to mean...

From [C++discussion group] 2017-06-05 11:10:42 0  1  785

How to solve the connection error encountered when compiling c++ with VC6.0?

How to solve the connection error encountered when compiling c++ with VC6.0? {code...}

From [C++discussion group] 2017-05-16 13:30:13 0  2  785

c++ - pat 1021 deepest root 第4个测试点无法通过

1.pat 1021 deepest root 第4个测试点无法通过2.代码：跟参考答案代码基本一致，只是变量名变了而已；求大神指出代码中无法通过测试的原因！谢谢 {代码...}

From [C++discussion group] 2017-04-17 15:38:57 0  0  784

c++ - 容器元素是const元素时的错误

"The C++ Standard forbids containers of const elements ""because allocator<const T&g...

From [C++discussion group] 2017-04-17 13:12:23 0  2  783