Cº¯ÊýÖ¸ÕëµÄÓ÷¨
2008-06-05 12:38------------------------------------------------------------------------------------------------
º¯ÊýÖ¸Õëͨ³£ÓÃÀ´ÊµÏֻص÷£¬Æä»ù±¾Ó÷¨ÈçÏ£º
1¡¢¶¨Ò庯ÊýÖ¸ÕëÀàÐÍ
// ¶¨ÒåÒ»¸öÔÐÍΪint Fun( int a );µÄº¯ÊýÖ¸Õë
typedef int (*PTRFUN) ( int aPara );
2¡¢º¯ÊýÖ¸Õë±äÁ¿µÄ¶¨Òå
PTRFUN pFun; // pFun Ϊº¯ÊýÖ¸Õë±äÁ¿Ãû
int (*pFun2) ( int a ); // pFun2Ò²ÊǺ¯ÊýÖ¸Õë±äÁ¿Ãû
3¡¢º¯ÊýÖ¸Õë×÷Ϊº¯ÊýµÄ²ÎÊý´«µÝ
// ¶¨Ò廨µ÷º¯Êý
int CallBack( int a ){
return ++a;
}
// ¶¨Ò廨µ÷Õߺ¯Êý
void Caller( PTRFUN cb )
// void Caller( int (*cb) ( int ) ) // Ò²¿ÉÕâÑùÉêÃ÷
{
int nPara = 1;
int nRet = cb( nPara );
}
// ʹÓûص÷
void Test(){
Caller( CallBack ); // Ö±½ÓʹÓûص÷º¯Êý
PTRFUN cb = CallBack; // int (*cb) ( int ); cb = CallBack;
int nRet1 = cb( 99 ); // nRet1 = 100;
}
4¡¢º¯ÊýÖ¸ÕëµÄÖ¸ÕëʹÓÃ
// ¶¨Ò庯ÊýÖ¸ÕëµÄÖ¸Õë
typedef int (**PTRPTRFUN) ( int aPara );
// º¯ÊýÖ¸ÕëµÄÖ¸Õë×÷Ϊ²ÎÊý
void PtrCaller( PTRPTRFUN cb )
// void PtrCaller( PTRFUN* cb ) // Ö¸ÕëÉêÃ÷
// void PtrCaller( int (**cb) ( int ) ) // ÔÐÍÉêÃ÷
{
int nRet = (*cb)(999); // nRet = 1000;
}
// ʹÓú¯ÊýÖ¸ÕëµÄÖ¸Õë
void Test(){
PTRFUN cb = CallBack;
PtrCaller( &cb );
}
5¡¢º¯ÊýÖ¸ÕëÊý×éµÄʹÓÃ
// º¯ÊýÖ¸ÕëÊý×éµÄ¶¨Òå
PTRFUN fArray[10];
// int (*fArray[10]) ( int ); // ÔÐͶ¨Òå
for ( int i = 0; i < 10; i++ ){
fArray[i] = CallBack;
int nRet = fArray[i](i); // nRet = i+1;
}
6¡¢º¯ÊýÖ¸ÕëµÄ´óС
// ¼ÈÈ»½ÐÖ¸Õ룬ËùÒÔ¸úÆÕͨµÄÖ¸ÕëÒ»ÑùÔÚ32λϵͳÏ´óС¶¼Îª4
int nSz1 = sizeof(PTRFUN); // nSz1 = 4;
int nSz2 = sizeof(PTRPTRFUN); // nSz2 = 4;
×¢Ò⣺
±àÒëÆ÷´æÔÚ¶àÖÖÖÖµ÷Óù淶£¬
Ïà¹ØÎĵµ£º
½ñÌ죬ÔÚÉè¼ÆC´úÂëµÄʱºò£¬Ïëµ½ÁËÒ»µã£¬ÏëÈÃB°üº¬A£¬²¢×ÔÓÉʹÓÃAµÄÍ·Îļþ£¬µ«ÊÇÈ´²»ÏëÈðüº¬BµÄCʹÓÃA£¬ÈÃAûÓÐȨÏÞÖ±½ÓʹÓÃʹÓÃC……ÈçÏÂͼ£º
²»ÖªµÀÓ¦¸ÃÔõô°ì¡£µ±Ê±ÐÄÏ룬Èç¹ûÊÇC++£¬Ê¹Óü̳У¬ºÜÁé»î¾ÍÄܸ㶨ÕâЩÊÂ
¸úͬÊÂÉÌÁ¿ÁËһϣ¬¶Ô·½¸ø³öÁË ......
ÔÚµ±½ñǶÈëʽ“ÎäÁÖ”ÖУ¬Á÷´«×ż¸±¾ÈËÈ˶¼Ïë͵ѧ¼¸ÕеÄCÓïÑÔµÄÎä¹¦ÃØ¼®¡£ÕâÐ©ÃØ¼®¶¼ÊÇ¿õÊÀÎäÑ§Ææ²ÅºÄ¾¡±ÏÉú¾«Á¦ËùÖø£¬²¿·ÖÃØ¼®Á÷¾ÊýÊ®ÔØÈÔ¾¾Ã²»Ë¥£¬ÈÃËüµÄÎÞÊýʵϰÕßÊÜÒæ·Ëdz¡£¡¡¡¡½ñÌ죬³ÐÃÉÎäÁÖ´ó»áËùÍÏ£¬ÔÚÕ⹫²¼Õ⼸±¾¹ØÓÚCµÄ“¾Ê锣¬Èøü¶àÈËʵϰ֮£¬Á·¾ÍÒ»Éí¾øÊÀµÄǶÈëʽCÓïÑԺù¦·ò¡£Î书à ......
±àÒëNative CµÄhello,worldÄ£¿é
Android ±àÒë»·¾³±¾Éí±È½Ï¸´ÔÓ£¬ÇÒ²»ÏñÆÕͨµÄ±àÒë»·¾³£ºÖ»Óж¥²ãĿ¼Ï²ÅÓÐMakefileÎļþ£¬¶øÆäËûµÄÿ¸öcomponent¶¼Ê¹ÓÃͳһ±ê×¼µÄ Android.mk. Android.mkÎļþ±¾ÉíÊDZȽϼòµ¥µÄ£¬²»¹ýËü²¢²»ÊÇÎÒÃÇÊìϤµÄMakefile£¬¶øÊǾ¹ýÁËAndroid×ÔÉí±àÒëϵͳµÄºÜ¶à´¦Àí£¬Òò´ËÒªÕæÕýÀ ......
clock()·µ»Øclock_tÀàÐÍ£»
ÔÚtime.hÍ·ÎļþÖУ¬¶¨ÒåÁË typedef long clock_t
clock()ÊÇÓÃÀ´¼ÆËãÁ½¸öʱ¼äµãÖ®¼äµÄʱ¼ä¼ä¸ô¡£ÈçϳÌÐò£º
#include <stdio.h>
int main()
{
int i = 0;
clock_t start_time, end_time;
start_time = clock(); //¿ªÊ¼¼ÆÊ±, start_time = 0
while( ......
exercise2.4
void squeeze(char s[],char t[])
{
int i,j,k;
int lens,lent;
lens=strlen(s);
lent=strlen(t);
for(i=0,k=0;i<lens;i++)
{
for(j=0;j<lent;j++)
if(s[i]==t[j])
break;
if(j==lent)
s[k++]=s[i];
}
s[k]='\0';
}
exercise2.5
int any(char s[],char t[ ......