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名词解释：man epoll之后，得到如下结果：

NAME
epoll – I/O event notification facility

SYNOPSIS
#include <sys/epoll.h>

DESCRIPTION
epoll is a variant of poll(2) that can be used either as Edge or Level
Triggered interface and scales well to large numbers of  watched  fds.
Three  system  calls  are provided to set up and control an epoll set:
epoll_create(2), epoll_ctl(2), epoll_wait(2).

An epoll set is connected to a file descriptor created  by  epoll_cre-
ate(2).   Interest for certain file descriptors is then registered via
epoll_ctl(2).  Finally, the actual wait is started by epoll_wait(2).

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http://groups.google.com/group/boost_doc_translation

http://code.google.com/p/boost-doc-zh/

1：

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

int main()
{
string str=”123456″;
int i;
char buf[10];

strcpy(buf,str.c_str());
sscanf(buf,”%d”,&i);

cout<<”i :”<<i<<endl;
return 0;
}

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1.   int sprintf( char *buffer, const char *format [, argument] … );
<stdio.h>
例如：
int ss;
char temp[64];
string str;
ss = 1000;
sprintf(temp, “%d”, ss);
string s(temp);
//调用string的方法
cout<<s.c_str()<<endl;//1000
cout<<s.size()<<endl;  //长度为4
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