Given the key, any record can be quickly located and retrieved directly, without the need for a sequential search of the file
Transactions need not be sorted and placed in sequence before processing.
Accumulation of transactions into batches is not required before processing them. They may be processed as and when generated.
It can support interactive online applications, which need to provide up-to-the-minute information in response to inquiries from users.
If required, it’s also possible to process direct file records sequentially in a record key sequence.
Steve ju answered the question on June 6, 2018 at 20:31
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#include
#include
#include
using namespace std;
class strtype {
char *p;
int len;
public:
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strtype::strtype (char *ptr)
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#include
#include
using namespace std;
class strtype {
char *p;
int len;
public:
strtype(char *ptr);
~strtype()
};
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myclass(const myclass &o);
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