include <stdio.h>
#include <conio.h>
#include <string.h>
#include <process.h>
#include <ctype.h>
#include <dos.h>
#include <dir.h>
#include <fstream.h>
// CLASS HAVING THE RECORD OF CUSTOMER
class customer
{
char ph[10];
char name[30];
char add[40];
char...