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 ×îÐÂÎÄÕ : c++

c/c++ÓïÑÔÎÊÌâÖпɱä²ÎÊý


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#include <stdarg.h>   
/**¡¡º¯ÊýÃû£ºmax  
  *¡¡¹¦ÄÜ£º·µ»Øn¸öÕûÊýÖеÄ×î´óÖµ  
  *  ²ÎÊý£ºnum£ºÕûÊýµÄ¸öÊý ...£ºnum¸öÊäÈëµÄÕûÊý  
  *  ·µ»ØÖµ£ºÇóµÃµÄ×î´óÕûÊý  
  */   
int max ( int num, ... )   
{   
¡¡int m = -0x7FFFFFFF; /* 32ϵͳÖÐ×îСµÄÕûÊý */   
¡¡va_list ap;   
¡¡va_start ( ap, num );   
¡¡for ( int i= 0; i< num; i++ )   
¡¡{   
¡¡¡¡int t = va_arg (ap, int);   
¡¡¡¡if ( t > m )   
¡¡¡¡{    ......

c/c++ÓïÑÔÎÊÌâÖпɱä²ÎÊý


 va_listÊÇc/c++ÓïÑÔÎÊÌâÖнâ¾ö¿É±ä²ÎÊýµÄÒ»×éºê.ÏÈÀ´¿´Ò»¸ö³ÌÐòÀý×Ó°É.
view plaincopy to clipboardprint?
#include <stdarg.h>   
/**¡¡º¯ÊýÃû£ºmax  
  *¡¡¹¦ÄÜ£º·µ»Øn¸öÕûÊýÖеÄ×î´óÖµ  
  *  ²ÎÊý£ºnum£ºÕûÊýµÄ¸öÊý ...£ºnum¸öÊäÈëµÄÕûÊý  
  *  ·µ»ØÖµ£ºÇóµÃµÄ×î´óÕûÊý  
  */   
int max ( int num, ... )   
{   
¡¡int m = -0x7FFFFFFF; /* 32ϵͳÖÐ×îСµÄÕûÊý */   
¡¡va_list ap;   
¡¡va_start ( ap, num );   
¡¡for ( int i= 0; i< num; i++ )   
¡¡{   
¡¡¡¡int t = va_arg (ap, int);   
¡¡¡¡if ( t > m )   
¡¡¡¡{    ......

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printf ( "I love you" ); 
printf ( "%d", a );
printf ( "%d,%d", a, b );
¡¡¡¡µÚÒ»¡¢¶þ¡¢Èý¸öprintf·Ö±ð½ÓÊÜ1¡¢2¡¢3¸ö²ÎÊý£¬ÈÃÎÒÃÇ¿´¿´printfº¯ÊýµÄÔ­ÐÍ£º
int printf ( const char *format, ... );
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¡¡¡¡¿É±ä²ÎÊý±íµÄÓ÷¨
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¡¡¡¡±ê×¼C/C++°üº¬Í·Îļþstdarg.h£¬¸ÃÍ·ÎļþÖж¨ÒåÁËÈçÏÂÈý¸öºê£º
void va_start ( va_list arg_ptr, prev_param ); /* ANSI version */
type va_arg ( va_list arg_ptr, type ); 
void va_end ( va_list arg_ptr );
¡¡¡¡ÔÚÕâЩºêÖУ¬va¾ÍÊÇvariable argument(¿É±ä²ÎÊý)µÄÒâ˼£»arg_ptrÊÇÖ¸Ïò¿É±ä²ÎÊý±íµÄÖ¸Õ룻prev_paramÔòÖ¸¿É±ä²ÎÊý±íµÄǰһ¸ö¹Ì¶¨²ÎÊý£»typeΪ¿É±ä²ÎÊýµÄÀàÐÍ¡£va_listÒ²ÊÇÒ» ......

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printf ( "I love you" ); 
printf ( "%d", a );
printf ( "%d,%d", a, b );
¡¡¡¡µÚÒ»¡¢¶þ¡¢Èý¸öprintf·Ö±ð½ÓÊÜ1¡¢2¡¢3¸ö²ÎÊý£¬ÈÃÎÒÃÇ¿´¿´printfº¯ÊýµÄÔ­ÐÍ£º
int printf ( const char *format, ... );
¡¡¡¡´Óº¯ÊýÔ­ÐÍ¿ÉÒÔ¿´³ö£¬Æä³ýÁ˽ÓÊÕÒ»¸ö¹Ì¶¨µÄ²ÎÊýformatÒÔÍ⣬ºóÃæµÄ²ÎÊýÓÃ"…"±íʾ¡£ÔÚC/C++ÓïÑÔÖУ¬"…"±íʾ¿ÉÒÔ½ÓÊܲ»¶¨ÊýÁ¿µÄ²ÎÊý£¬ÀíÂÛÉÏÀ´½²£¬¿ÉÒÔÊÇ0»ò0ÒÔÉϵÄn¸ö²ÎÊý¡£
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¡¡¡¡¿É±ä²ÎÊý±íµÄÓ÷¨
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¡¡¡¡±ê×¼C/C++°üº¬Í·Îļþstdarg.h£¬¸ÃÍ·ÎļþÖж¨ÒåÁËÈçÏÂÈý¸öºê£º
void va_start ( va_list arg_ptr, prev_param ); /* ANSI version */
type va_arg ( va_list arg_ptr, type ); 
void va_end ( va_list arg_ptr );
¡¡¡¡ÔÚÕâЩºêÖУ¬va¾ÍÊÇvariable argument(¿É±ä²ÎÊý)µÄÒâ˼£»arg_ptrÊÇÖ¸Ïò¿É±ä²ÎÊý±íµÄÖ¸Õ룻prev_paramÔòÖ¸¿É±ä²ÎÊý±íµÄǰһ¸ö¹Ì¶¨²ÎÊý£»typeΪ¿É±ä²ÎÊýµÄÀàÐÍ¡£va_listÒ²ÊÇÒ» ......

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C++ͨ¹ýADOÁ¬½ÓACCESS(»òÕßSQL Server)Êý¾Ý¿âÀý×Ó

#include "iostream.h"
#include "stdio.h"
#import "C:\program files\common files\system\ado\msado15.dll" no_namespace rename("EOF","adoEOF")
int main(int argc, char* argv[])
{
   ::CoInitialize(NULL);
_ConnectionPtr m_pConnection;
m_pConnection.CreateInstance("ADODB.Connection");
try               
    {
   m_pConnection->Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Database\\mydb.mdb","","",adModeUnknown);
//m_pConnection->Open("Server=192.168.0.150,1433;uid=sa;pwd=123456;DATABASE=temp;Provider=SQLOLEDB;","","",-1);//Á¬½ÓSQL Server
}
catch(_com_error e)
{
        cout<<"Êý¾Ý¿âÁ¬½Óʧ°Ü£¬È·ÈÏÊý¾Ý¿âmydb.mdbÊÇ·ñÔÚµ±Ç°Â·¾¶ÏÂ!"<<endl;
   return FALSE;
    }
_RecordsetPtr m_pRecordset;
m_pRecordset.CreateInstance("ADODB.Recordset");
try
    {  
 &n ......

C++ͨ¹ýADOÁ¬½ÓACCESS(»òÕßSQL Server)Êý¾Ý¿âÀý×Ó

#include "iostream.h"
#include "stdio.h"
#import "C:\program files\common files\system\ado\msado15.dll" no_namespace rename("EOF","adoEOF")
int main(int argc, char* argv[])
{
   ::CoInitialize(NULL);
_ConnectionPtr m_pConnection;
m_pConnection.CreateInstance("ADODB.Connection");
try               
    {
   m_pConnection->Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Database\\mydb.mdb","","",adModeUnknown);
//m_pConnection->Open("Server=192.168.0.150,1433;uid=sa;pwd=123456;DATABASE=temp;Provider=SQLOLEDB;","","",-1);//Á¬½ÓSQL Server
}
catch(_com_error e)
{
        cout<<"Êý¾Ý¿âÁ¬½Óʧ°Ü£¬È·ÈÏÊý¾Ý¿âmydb.mdbÊÇ·ñÔÚµ±Ç°Â·¾¶ÏÂ!"<<endl;
   return FALSE;
    }
_RecordsetPtr m_pRecordset;
m_pRecordset.CreateInstance("ADODB.Recordset");
try
    {  
 &n ......

C++ͨ¹ýADOÁ¬½ÓACCESS(»òÕßSQL Server)Êý¾Ý¿âÀý×Ó

#include "iostream.h"
#include "stdio.h"
#import "C:\program files\common files\system\ado\msado15.dll" no_namespace rename("EOF","adoEOF")
int main(int argc, char* argv[])
{
   ::CoInitialize(NULL);
_ConnectionPtr m_pConnection;
m_pConnection.CreateInstance("ADODB.Connection");
try               
    {
   m_pConnection->Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Database\\mydb.mdb","","",adModeUnknown);
//m_pConnection->Open("Server=192.168.0.150,1433;uid=sa;pwd=123456;DATABASE=temp;Provider=SQLOLEDB;","","",-1);//Á¬½ÓSQL Server
}
catch(_com_error e)
{
        cout<<"Êý¾Ý¿âÁ¬½Óʧ°Ü£¬È·ÈÏÊý¾Ý¿âmydb.mdbÊÇ·ñÔÚµ±Ç°Â·¾¶ÏÂ!"<<endl;
   return FALSE;
    }
_RecordsetPtr m_pRecordset;
m_pRecordset.CreateInstance("ADODB.Recordset");
try
    {  
 &n ......

Visual c++ 6.0 ADO access

ADO¿â°üº¬Èý¸ö»ù±¾½Ó¿Ú:_ConnectionPtr½Ó¿Ú¡¢_CommandPtr½Ó¿ÚºÍ_RecordsetPtr½Ó¿Ú¡£
_ConnectionPtr½Ó¿Ú·µ»ØÒ»¸ö¼Ç¼¼¯»òÒ»¸ö¿ÕÖ¸Õë¡£
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ʹÓÃ_ConnectionPtr½Ó¿Ú·µ»ØÒ»¸ö¼Ç¼¼¯²»ÊÇÒ»¸öºÃµÄʹÓ÷½·¨¡£
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_CommandPtr½Ó¿Ú·µ»ØÒ»¸ö¼Ç¼¼¯¡£
ËüÌṩÁËÒ»ÖÖ¼òµ¥µÄ·½·¨À´Ö´Ðзµ»Ø¼Ç¼¼¯µÄ´æ´¢¹ý³ÌºÍSQLÓï¾ä¡£
ÔÚʹÓÃ_CommandPtr½Ó¿Úʱ£¬Äã¿ÉÒÔÀûÓÃÈ«¾Ö_ConnectionPtr½Ó¿Ú£¬Ò²¿ÉÒÔÔÚ_CommandPtr½Ó¿ÚÀïÖ±½ÓʹÓÃÁ¬½Ó´®¡£
Èç¹ûÄãÖ»Ö´ÐÐÒ»´Î»ò¼¸´ÎÊý¾Ý·ÃÎʲÙ×÷£¬ºóÕßÊDZȽϺõÄÑ¡Ôñ¡£
µ«Èç¹ûÄãҪƵ·±·ÃÎÊÊý¾Ý¿â£¬²¢Òª·µ»ØºÜ¶à¼Ç¼¼¯£¬ÄÇô£¬ÄãÓ¦¸ÃʹÓÃÈ«¾Ö_ConnectionPtr½Ó¿Ú´´½¨Ò»¸öÊý¾ÝÁ¬½Ó£¬
È»ºóʹÓÃ_CommandPtr½Ó¿ÚÖ´Ðд洢¹ý³ÌºÍSQLÓï¾ä¡£
_RecordsetPtrÊÇÒ»¸ö¼Ç¼¼¯¶ÔÏó¡£
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¡£Í¬_CommandPtr½Ó¿ÚÒ»Ñù£¬Ëü²»Ò»¶¨ÒªÊ¹ÓÃÒ»¸öÒѾ­´´½¨µÄÊý¾ÝÁ¬½Ó£¬
¿ÉÒÔÓÃÒ»¸öÁ¬½Ó´®´úÌæÁ¬½ÓÖ¸Õ븳¸ø_RecordsetPtrµÄconnection³ÉÔ±±äÁ¿£ ......

C/C++ÖйØÓÚ±éÀúÎļþ¼ÐµÄ²Ù×÷

#include <windows.h>
#include <stdio.h>
void FindFileInDir(char* rootDir, char* strRet)
{
char fname[256];
ZeroMemory(fname,256);
WIN32_FIND_DATA fd;
ZeroMemory(&fd, sizeof(WIN32_FIND_DATA));
HANDLE hSearch;
char filePathName[256];
char tmpPath[256];
ZeroMemory(filePathName, 256);
ZeroMemory(tmpPath, 256);
strcpy(filePathName, rootDir);
BOOL bSearchFinished = FALSE;
if( filePathName[strlen(filePathName) -1] != '\\' )
{
strcat(filePathName, "\\");
}
strcat(filePathName, "*");
hSearch = FindFirstFile(filePathName, &fd);
//Is directory
if( (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
&& strcmp(fd.cFileName, ".") && strcmp(fd.cFileName, "..") )
{
strcpy(tmpPath, rootDir);
strcat(tmpPath, fd.cFileName);
FindFileInDir(tmpPath, strRet);
}
else if( strcmp(fd.cFileName, ".") && strcmp(fd.cFileName, "..") )
{
sprintf(fname, "%-50.50s", fd.cFileName);
strcat(strRet + strRet[strlen(strRet)] , fname);
}
while( ! ......

C/C++ÖйØÓÚ±éÀúÎļþ¼ÐµÄ²Ù×÷

#include <windows.h>
#include <stdio.h>
void FindFileInDir(char* rootDir, char* strRet)
{
char fname[256];
ZeroMemory(fname,256);
WIN32_FIND_DATA fd;
ZeroMemory(&fd, sizeof(WIN32_FIND_DATA));
HANDLE hSearch;
char filePathName[256];
char tmpPath[256];
ZeroMemory(filePathName, 256);
ZeroMemory(tmpPath, 256);
strcpy(filePathName, rootDir);
BOOL bSearchFinished = FALSE;
if( filePathName[strlen(filePathName) -1] != '\\' )
{
strcat(filePathName, "\\");
}
strcat(filePathName, "*");
hSearch = FindFirstFile(filePathName, &fd);
//Is directory
if( (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
&& strcmp(fd.cFileName, ".") && strcmp(fd.cFileName, "..") )
{
strcpy(tmpPath, rootDir);
strcat(tmpPath, fd.cFileName);
FindFileInDir(tmpPath, strRet);
}
else if( strcmp(fd.cFileName, ".") && strcmp(fd.cFileName, "..") )
{
sprintf(fname, "%-50.50s", fd.cFileName);
strcat(strRet + strRet[strlen(strRet)] , fname);
}
while( ! ......
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