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#include<cmath>
#include<cstdlib>
#include<iostream>
#include<fstream>
using namespace std;
int main ()
{
char filename [25];
ifstream myfile;
cin.getline(filename,25);...

you need:
myfile.getline(number,25); and atoi().

You can ignore operator=, since I don't use it.

I mean, If I comment out that line copy ctor, g++ will generate one, and it tries to call Uncopyable(const Uncopyable &rhs){cout<<"oooops\n";}, and...

Thanks, but I want a more precise answer...

See the following code:

#include<iostream>
using namespace std;
class Uncopyable
{
protected:
Uncopyable(){cout<<"hehe\n";}
~Uncopyable(){}
private:
Uncopyable(const Uncopyable...

I thought OS don't allocate any swap area nor physical memory to a new got virtual space, but allocate physical pages directly when this space is written/read, and swap out when done some thing.Do...

1, reasonable
2,don't understand
3,AFAIK, on linux threads' stack is allocated on heap of the main thread and managed by thread lib.
4,if the operating system allocate a very large heap to a...

We know for every process, it has 4G virtual memory on a 32bit machine.
since virtual memory is not physical memory, why don't operating system allocate all it's virtual memory to it, but set a...

That's good. But what is the backward of my implementation? If I change the static variable num to any other integer such as 3, I can get a class that can only be initialized three times. Isn't it...

but if the user use the public function to instantiate a second time, it can also only be detected at run time. Isn't it?

How to write a class that can only be instancialized once?

what about my implementation below?


#include<iostream>
#include<stdexcept>
using namespace std;

class Singleton
{
public:
...

what's the relationship among locale, glibc, charset, charmap and fonts?
why locale needs to be generated by glibc? how?
what are in the locale-archive file?
and what are in font files?

'var' should be initialized or assigned a value.

'result' must be a global array or static array. And the return type of matmultiply should be int **, since you can't really return an array in C.

Just sleep() your program, then wake up it when you need.

define another two semaphore:

sem_t zero, one;

a thread wait for zero and post one, while the other thread wait for one and post zero.

try system("clear");

Of course. In bash try
$help while
example:
i=4; while [ $i -gt 0 ]; do echo $i; let i--; done;

it isn't what I want.
I need a tool like winhex which can check the entire virtual memory of a process.

cannot generate .ko file on my linux, although it can generate module.symvers.
But when I copy .c file and Makefile to another linux computer, there's no problem.

The strange thing is: make is...

How to see the entire memory of a process in hex?

In this struct there are start_stack(start address of user space stack) and stack_vm(mount of pages of stack).

But why it doesn't have a member like end_stack?
Is it right to figure the end...

Thank you Corona688 (https://www.unix.com/members/43551.html)

Thanks for your patient and zeal. I will study the kernel earnestly. One years ago, I know nothing about linux. It is UNIX.COM who...

somebody?

It is not that complex. The folowing works perfect on bash.


ls !(*.jpg|*.xml|*.sql)