c++ program for updating a record?

Question

example program to update a record or an algorithm of it

Answer 1

typedef struct _contact
{
char ID[10];
char fname[20];
char sname[20];
} contact;

void update(FILE *fp, int recordPos, contact *record)
{
fseek(fp, recordPos * sizeof(contact, SEEK_SET);
fwrite((void *)record, sizeof(contact), 1, fp);
}


easy no?

Answer 2

It depends what type of record you're talking about?

Do you have a simplistic database like they teach in intro to C/C++ classes or are you working with a real database like SQL?

If the former, its simple -- you just find the record, make the change and write it to the file.

If you're using SQL you need to communicate with (or write your own) SQL driver to issue the appropriate command.

Answer 3

SQL is used to update records in a table.