ProC 连接Oracle代码

代码如下：

int connectDb() 
{ 
EXEC SQL BEGIN DECLARE SECTION; 
char username[20]; 
char password[20]; 
char connect_string[20]; 
EXEC SQL END DECLARE SECTION; 

strcpy(username,"lbc1"); 
strcpy(password,"lbtux"); 
strcpy(connect_string, "lbc1"); 

EXEC SQL CONNECT :username IDENTIFIED BY :password USING :connect_string; 
if ( sqlca.sqlcode < 0 ) 
{ 
return -1; 
} 
}