c/c++_static±äÁ¿µÄÓ¦ÓÃ
ÔÚCÓïÑÔ±à³ÌÖУ¬staticµÄÒ»¸ö×÷ÓÃÊÇÐÅÏ¢ÆÁ±Î£¡
±È·½Ëµ£¬Äã×Ô¼º¶¨ÒåÁËÒ»¸öÎļþ -- ¸ÃÎļþÖÐÓÐһϵÁеĺ¯ÊýÒÔ¼°±äÁ¿µÄÉùÃ÷ºÍ¶¨Ò壡
ÄãÏ£Íû¸ÃÎļþÖеÄһЩº¯ÊýºÍ±äÁ¿Ö»Äܱ»¸ÃÎļþÖеĺ¯ÊýʹÓã¬ÄÇô£¬Äã¿ÉÒÔÔڸú¯Êý¡¢±äÁ¿µÄÇ°Ãæ¼ÓÉÏstatic£¬´ú±íËûÃÇÖ»Äܱ»µ±Ç°ÎļþÖеĺ¯ÊýʹÓã¡
¶øÔÚC++ÖУ¬ÓÃstaticÀ´×÷ΪÐÅÏ¢ÆÁ±Î¾ÍÏÔµÃûÓбØÒªÁË£¡ÒòΪ£¬C++ÓÐÁËÐÅÏ¢ÆÁ±ÎµÄÀûÆ÷ -- class»úÖÆ£¡
ÀàÖеÄprivateÊôÐԵıäÁ¿ºÍº¯Êý¾Í¶ÔÍâ½ûÖ¹·ÃÎÊ£¡
È»ºóÊÇC/C++ͨÓõĺ¯Êý×÷ÓÃÓòµÄstaticÐ͵ıäÁ¿£¡ÆäÄ¿µÄ£¬Ò²ÊÇΪÁËÐÅÏ¢µÄÆÁ±Î£¡
int fun() {
static int a = 1;
a++;
}
ÔÚµÚÒ»´Î½øÈëÕâ¸öº¯ÊýµÄʱºò£¬±äÁ¿a±»³õʼ»¯Îª1£¡²¢½Ó×Å×ÔÔö1£¡
ÒÔºóÿ´Î½øÈë¸Ãº¯Êý£¬a¾Í²»»á±»Ôٴγõʼ»¯ÁË£¬½ö½øÐÐ×ÔÔö1µÄ²Ù×÷£¡
ÔÚstatic·¢Ã÷Ç°£¬Òª´ïµ½Í¬ÑùµÄ¹¦ÄÜ£¬ÔòÖ»ÄÜʹÓÃÈ«¾Ö±äÁ¿£º
int a = 1;
int fun() {
a++;
}
ÄÇô£¬aµÄÖµ¾ÍÓпÉÄܱ»ÆäËûº¯ÊýËù¸Ä±ä£¡
×îºó£¬ËµËµÀàÖеÄstatic±äÁ¿ºÍº¯Êý¡£
ÕâÖÖ´æ´¢ÊôÐԵıäÁ¿ºÍº¯ÊýÊÇͬһÖÖÀàµÄ²»Í¬ÊµÀýÖ®¼äͨÐŵÄÇÅÁº£¡
#include <iostream>
using namespace std;
class A {
public:
static int num; // ͳ¼Æ´´½¨Á˶àÉÙ¸öʵÀý
A () {num++}; // ÿ´´½¨Ò»¸öʵÀý£¬¾ÍÈÃnum×ÔÔö1
// ·µ»Øͨ¹ý¹¹Ô캯ÊýËù´´½¨¹ýµÄAÀàʵÀýµÄÊýÄ¿
static int how_many_instance() {
return num;
}
}
static A::num = 0; // ÐèÒªÔÚÀàÉêÃ÷µÄÍⲿµ¥¶À³õʼ»¯£¡
int main() {
cout << A::how_many_instance() << endl;
A a, b, c, d;
cout << A::how_many_instance() << endl;
Ïà¹ØÎĵµ£º
½ñÌìΪÁ˳¹µ×¸ã¶¨Ò»¸ö¹ØÓÚcÖÐÊý×é³õʼ»¯ºÍÉùÃ÷²»Í¬Çé¿öÏ£¬±ÈÈçÖ»ÉùÃ÷Ò»¸öÊý×échar str[20];ÄÇôÕâstrÀïÃæÊÇʲôÄÚÈÝÄØ£¿ÎÒÓÃvc6++£¬debugÏ¿´µ½¶¼ÊÇ-56¶öascÂ룬ºóÀ´Çë½ÌÁËÒ»¸ö»ªÎªµÄ´óÅ££¬Ëû˵ °´ÕÕÀíÂÛÀ´ËµÀïÃæµÄÄÚÈݶ¼ÊÇÓпÉÄܵģ¬ÕâºÍ½Ð×ö“ÔàÄÚ´æ”»òÕß½Ð×ö“Ò°Êý×锡£ºÃÁ˵ÚÒ»¸öÎÊÌâ¸ã¶®ÁË¡£
......
Java "ÓÐÀíÓÉ" ±È C++ ¿ì
×î½üÉÏCSDN±È½Ï¶à£¬ÓÖ¿´µ½ËµJava±ÈC++¸ü¿ìµÄÌû×Ó¡£
JavaÔÚijЩÇé¿öϱÈC++¿ìÎÒÈÏΪÊǺÜÓеÀÀíµÄ¡£ÀýÈç¿ÉÒÔ¸ù¾ÝÌض¨µÄCPU½øÐÐÓÅ»¯µÈµÈ¡£
ÓÐλ½Ð wingfiring(±ð¶ºÁË)(·ÇµäÐÍͺ×Ó) µÄÀÏÐÖ·¢ÁËÒ»¸öÌû×Ó£¬ÔÎÄÈçÏ£º
ºÃ£¬ÎÒûÄÇô¶àʱ¼ä³³C++ºÃ»¹ÊÇJavaºÃ£¬ËùÒÔ£¬ÎÒ¾ÍÏÈÕ°ÑöÒ»ÏÂÂ¥Ö÷¸ø³öµÄÁ ......
¿ªÊ¼ÔÚlinuxÏÂ×öcÓïÑÔ¿ª·¢
±¾ÆªÎÄÕÂÖ¼ÔÚ½éÉÜÈçºÎ¿ªÊ¼ÔÚlinuxÏÂÃæ½øÐÐCÓïÑÔ³ÌÐòÉè¼Æ£¬ÒÔ¼°ÈçºÎʹÓóÌÐòÉè¼Æ¼°µ÷ÊÔ¹¤¾ß½øÐбàдC³ÌÐò¡£Ñ§»áʹÓÃgcc¼°gdbµÈ¹¤¾ß½øÐÐlinuxϵÄc±àдºÍµ÷ÊÔ¡£
ÔÚ¿ªÊ¼Ö®Ç°£¬Ê×ÏÈҪ˵Ã÷µÄÊÇ£¬linux¿ª·¢³ÌÐò×îÖ÷ÒªµÄ±à¼Æ÷ÊÇvi/vim±à¼Æ÷£¬µ±È»»¹ÓÐemacs,gedit£¬Ö»ÊÇvi/vimµÄÓû§ÊµÔÚÊÇѹµ¹ÐԵĶàÊ ......
1 ¿É±äÊý¾Ý½á¹¹
struct var_data
{
int len;
char data[0];
};
±éÀúlenºóÊý¾Ý
for(i = 0; i < s.len; i++)
{
printf("%02x",s.data[i]);
}
2 case ·¶Î§Çø¼ä ¡¾x£¬y¡¿
3 Óï¾ä±í´ï
#define min_t (type, x, y) \
({ type __x = (x); type __y = ......
1 ÏÂÔØ°²×°jre£¬Eclipse±¾ÉíÊÇJava³ÌÐò£¬ÔËÐеÄʱºòÐèÒªjre¡£
2 ÏÂÔØEclispe for C/C++£¬½âѹµ½ÈÎÒâλÖá£
3 ÏÂÔØMingw°²×°³ÌÐò£¬ÔËÐУ¬Ñ¡ÔñÐèÒªµÄ×é¼þ£¬ÎÒÑ¡ÔñÁËg++±àÒëÆ÷ºÍMakefile¹¤¾ß£¬Ëü»á×Ô¶¯ÏÂÔØ°²×°¡£
4 ÏÂÔØ°²×°gdbµ½MingwµÄ°²×°Ä¿Â¼£¬gdbµÄbinºÍincludeĿ¼»áºÍMingwµÄͬÃûĿ¼ºÏ²¢µÄ¡£
ÏÂÃ濪ʼÅäÖÃEclipse¡ ......