锘??xml version="1.0" encoding="utf-8" standalone="yes"?>亚洲欧美日韩精品久久久,国产亚洲精品美女,欧美日韩国产大片http://m.shnenglu.com/wolf5x/category/10845.htmlgood luck & have funzh-cnSun, 04 Sep 2011 01:38:25 GMTSun, 04 Sep 2011 01:38:25 GMT60The "Clockwise/Spiral Rule"http://m.shnenglu.com/wolf5x/archive/2011/08/31/154778.html<A href="mailto:wolf5x1016@gmail.com">wolf5x</A><A href="mailto:wolf5x1016@gmail.com">wolf5x</A>Wed, 31 Aug 2011 05:07:00 GMThttp://m.shnenglu.com/wolf5x/archive/2011/08/31/154778.htmlhttp://m.shnenglu.com/wolf5x/comments/154778.htmlhttp://m.shnenglu.com/wolf5x/archive/2011/08/31/154778.html#Feedback0http://m.shnenglu.com/wolf5x/comments/commentRss/154778.htmlhttp://m.shnenglu.com/wolf5x/services/trackbacks/154778.htmlvoid (*signal(int, void (*fp)(int)))(int); 
Question:
What is 'signal' ?
 
#include <cstdio>
using namespace std;

void f(int);
void (*pf)(int), (*qf)(int);
void (*hf(intvoid(*)(int)))(int);

typedef 
void (*sighandler_t)(int);

sighandler_t signal(
int, sighandler_t);


void f(int a) 
{
    printf(
"void f(int %d)\n", a);
}


void (*hf(int _i, void(*_pf)(int)))(int)
{
    printf(
"_i = %d\n", _i);
    _pf(_i);
    
return _pf;
}


sighandler_t signal(
int signum, sighandler_t sighandler)
{
    printf(
"signal num = %d\n", signum);
    sighandler(signum);
    
return sighandler;
}


int main()
{
    pf 
= &f;
    qf 
= hf(12, pf);
    qf(
23);
    
    signal(
54, f);
    
return 0;
}



void (*signal(int, void (*)(int)))(int);
Answer:
signal is a function, passing {an int and a pointer [to a function passing an int returning nothing (void)]}, returning {a pointer [to a function passing an int returning nothing (void)]}.



wolf5x 2011-08-31 13:07 鍙戣〃璇勮
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欏轟究璐翠釜闅愬紡綾誨瀷杞崲瑙勫垯澶嶄範涓涓?/title><link>http://m.shnenglu.com/wolf5x/archive/2009/10/27/99552.html</link><dc:creator><A href="mailto:wolf5x1016@gmail.com">wolf5x</A></dc:creator><author><A href="mailto:wolf5x1016@gmail.com">wolf5x</A></author><pubDate>Tue, 27 Oct 2009 02:05:00 GMT</pubDate><guid>http://m.shnenglu.com/wolf5x/archive/2009/10/27/99552.html</guid><wfw:comment>http://m.shnenglu.com/wolf5x/comments/99552.html</wfw:comment><comments>http://m.shnenglu.com/wolf5x/archive/2009/10/27/99552.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.shnenglu.com/wolf5x/comments/commentRss/99552.html</wfw:commentRss><trackback:ping>http://m.shnenglu.com/wolf5x/services/trackbacks/99552.html</trackback:ping><description><![CDATA[1. 濡傛灉鍏朵腑涓涓搷浣滄暟涓簂ong double綾誨瀷,鍒欏彟涓涓搷浣滄暟琚漿鎹負long double. <br>2. 鍚﹀垯,濡傛灉鍏朵腑涓涓搷浣滄暟涓篸ouble, 鍒欏彟涓涓搷浣滄暟琚漿鎹負double. <br>3. 鍚﹀垯,濡傛灉鍏朵腑涓涓搷浣滄暟涓篺loat, 鍒欏彟涓涓搷浣滄暟涔熻漿鎹負float. <br>4. 鍚﹀垯,涓や釜鎿嶄綔鏁拌繘琛?"鏁村瀷鍗囩駭": <br>    a. 濡傛灉鍏朵腑涓涓搷浣滄暟涓簎nsigned long int, 鍒欏彟涓涓搷浣滄暟涔熻瑙嗕負unsigned long int. <br>    b. 鍚﹀垯,濡傛灉鍏朵腑涓涓搷浣滄暟涓簂ong int,鑰屽彟涓涓搷浣滄暟綾誨瀷鏄痷nsigned int, 騫朵笖long int鑳藉琛ㄧずunsigned int鐨勬墍鏈夊?鍒欏彟涓涓搷浣滄暟涔熻瑙嗕負long int;濡傛灉long int涓嶈兘琛ㄧずunsigned int鐨勬墍鏈夊?鍒欎袱涓暟閮借瑙嗕負unsigned long int. <br>    c. 鍚﹀垯, 濡傛灉鍏朵腑涓涓搷浣滄暟鏄痩ong int,鍒欏彟涓涓搷浣滄暟涔熻瑙嗕負long int. <br>    d. 鍚﹀垯, 濡傛灉鍏朵腑涓涓搷浣滄暟鏄痷nsigned int, 鍒欏彟涓涓搷浣滄暟涔熻瑙嗕負unsigned int. <br>    e. 鍚﹀垯, 涓や釜鎿嶄綔鏁伴兘琚涓篿nt. <br> <img src ="http://m.shnenglu.com/wolf5x/aggbug/99552.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.shnenglu.com/wolf5x/" target="_blank"><A href="mailto:wolf5x1016@gmail.com">wolf5x</A></a> 2009-10-27 10:05 <a href="http://m.shnenglu.com/wolf5x/archive/2009/10/27/99552.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>灝忕帺鎰忓効 鍑芥暟鎸囬拡瀹氫箟http://m.shnenglu.com/wolf5x/archive/2009/06/10/87289.html<A href="mailto:wolf5x1016@gmail.com">wolf5x</A><A href="mailto:wolf5x1016@gmail.com">wolf5x</A>Wed, 10 Jun 2009 03:30:00 GMThttp://m.shnenglu.com/wolf5x/archive/2009/06/10/87289.htmlhttp://m.shnenglu.com/wolf5x/comments/87289.htmlhttp://m.shnenglu.com/wolf5x/archive/2009/06/10/87289.html#Feedback0http://m.shnenglu.com/wolf5x/comments/commentRss/87289.htmlhttp://m.shnenglu.com/wolf5x/services/trackbacks/87289.html 1 #include<iostream>
 2 using namespace std;
 3  
 4 #define DF(N) void N(){\
 5    cout<<"function " #N " called..."<<endl;}
 6  
 7 DF(a)DF(b)DF(c)DF(d)DF(e)DF(f)
 8  
 9 void (*func_table[])()={a,b,c,d,e,f};
10 
11 int main(){
12     for(int i=0; i<6; i++){
13         (func_table[i])();
14     }
15     return 0;
16 }


wolf5x 2009-06-10 11:30 鍙戣〃璇勮
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