Re: why there is no variabel after &

"" <>
Wed, 16 Dec 2009 22:12:36 -0800 (PST)
On Dec 17, 10:21 am, hon123456 <> wrote:

Dear all,

           I have following code:

#include <stdio.h> // for printf
#include <SQLAPI.h> // main SQLAPI++ header

int main(int argc, char* argv[])
    SAConnection con; // create connection object

        // connect to database
        // in this example it is Oracle,
        // but can also be Sybase, Informix, DB2
        // SQLServer, InterBase, SQLBase and ODBC
            "test", // database name
            "tester", // user name
            "tester", // password

        printf("We are connected!\n");

        // Disconnect is optional
        // autodisconnect will ocur in destructor if needed

        printf("We are disconnected!\n");
    catch(SAException &x)
        // SAConnection::Rollback()
        // can also throw an exception
        // (if a network error for example),
        // we will be ready
            // on error rollback changes
        catch(SAException &)
        // print error message
        printf("%s\n", (const char*)x.ErrText());

    return 0;


What I don't understand is catch(SAException &) . Please notice that
the & is withou a name after it. So what does this (SAException &)


If u catch with a name and later if you donot use..u will get a
warning. This avoids warning "unused var" and also catches the
exeption obj by ref, and ignores it.

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