绘声绘彩的生活志

#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
 
class baseA{
public:
	virtual ~baseA()
		{
			printf("~baseA\r\n");
		};
	virtual void sayHello(const char *str){
		printf("baseA say: %s.\r\n", str);
	};
};
 
class derivedA : public baseA {
public:
	virtual ~derivedA()
		{
			printf("~derivedA\r\n");
		};
	virtual void sayHello(const char *str){
		printf("derivedA say: %s.\r\n", str);
	};
};
 
class finalA : public derivedA {
public:
	~finalA()
		{
			printf("~finalA\r\n");
		};
	void sayHello(const char *str){
		printf("derivedA say: %s.\r\n", str);
	};
};
 
int main()
{
	finalA *a = new finalA();
	a->sayHello("hello virtual function!");
	delete a;
    return 0;
}

#include <pthread.h> #include <stdio.h> #include <stdlib.h> #include <errno.h> class baseA{ public: virtual ~baseA() { printf("~baseA\r\n"); }; virtual void sayHello(const char *str){ printf("baseA say: %s.\r\n", str); }; }; class derivedA : public baseA { public: virtual ~derivedA() { printf("~derivedA\r\n"); }; virtual void sayHello(const char *str){ printf("derivedA say: %s.\r\n", str); }; }; class finalA : public derivedA { public: ~finalA() { printf("~finalA\r\n"); }; void sayHello(const char *str){ printf("derivedA say: %s.\r\n", str); }; }; int main() { finalA *a = new finalA(); a->sayHello("hello virtual function!"); delete a; return 0; }

    if(connXLS->Connected)
        connXLS->Connected = false;
 
    if(CompareStr(sFileExtName, "xls")==0)
    {
        sConnectString = "Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;Persist Security Info=false;Data Source="
                                   + sXlsFileName;
        //2003（Microsoft.Jet.Oledb.4.0）
        //string strConn = string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'", excelFilePath);
    }else{
        sConnectString = "Provider=Microsoft.ACE.OLEDB.12.0;Extended Properties='Excel 8.0;HDR=YES;IMEX=1';Persist Security Info=false;Data Source="
                                   + sXlsFileName;    
        //2007（Microsoft.ACE.OLEDB.12.0）
        //string strConn = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'", excelFilePath);                           
    }        
 
    connXLS->ConnectionString = sConnectString;
    adoXLS->Connection = connXLS;
    try
    {
        AnsiString sTableName;
        OleVariant EmptyParam = varEmpty;  
        EmptyParam.VType = VT_ERROR;
        EmptyParam.VError = DISP_E_PARAMNOTFOUND;
 
        auto_ptr<TADOQuery> query(new TADOQuery(NULL));
        query->Connection = connXLS;
        connXLS->OpenSchema(siTables, EmptyParam, EmptyParam, (TADODataSet*)query.get());
 
        for ( ; !query->Eof; query->Next() )
        {
            sTableName = query->FieldByName("TABLE_NAME")->AsString;
            printscreen("当前Excel %s", sTableName.c_str());
        }  
 
        if(adoXLS->Active)
            adoXLS->Close();
        adoXLS->TableName = sTableName;
        adoXLS->Open();
    }catch(Exception &exception){
        ShowMessage(exception.Message);
        return;
    }

if(connXLS->Connected) connXLS->Connected = false; if(CompareStr(sFileExtName, "xls")==0) { sConnectString = "Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;Persist Security Info=false;Data Source=" + sXlsFileName; //2003（Microsoft.Jet.Oledb.4.0） //string strConn = string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'", excelFilePath); }else{ sConnectString = "Provider=Microsoft.ACE.OLEDB.12.0;Extended Properties='Excel 8.0;HDR=YES;IMEX=1';Persist Security Info=false;Data Source=" + sXlsFileName; //2007（Microsoft.ACE.OLEDB.12.0） //string strConn = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'", excelFilePath); } connXLS->ConnectionString = sConnectString; adoXLS->Connection = connXLS; try { AnsiString sTableName; OleVariant EmptyParam = varEmpty; EmptyParam.VType = VT_ERROR; EmptyParam.VError = DISP_E_PARAMNOTFOUND; auto_ptr<TADOQuery> query(new TADOQuery(NULL)); query->Connection = connXLS; connXLS->OpenSchema(siTables, EmptyParam, EmptyParam, (TADODataSet*)query.get()); for ( ; !query->Eof; query->Next() ) { sTableName = query->FieldByName("TABLE_NAME")->AsString; printscreen("当前Excel %s", sTableName.c_str()); } if(adoXLS->Active) adoXLS->Close(); adoXLS->TableName = sTableName; adoXLS->Open(); }catch(Exception &exception){ ShowMessage(exception.Message); return; }