Page 188 - C++

}

OR

(b ) Given a binary file PHONE.DAT, containing records of the following class type: (3)

class Phonelist

{

char name[20];

char address[30];

char areacode[5];

char Phoneno[15];

public:

void Register();
void Show();

void CheckCode(char AC[])
{

return(strcmp(areacode,AC);
}

};

Write a function TRANSFER( ) in C++, that would copy all those records which are having areacode as “DEL”
from PHONE.DAT to PHONBACK.DAT.

Ans

void TRANSFER()
{
fstream File1,File2;
Phonelist P;
File1.open(“PHONE.DAT”, ios::binary|ios::in);
File2.open(“PHONEBACK.DAT”, ios::binary|ios::OUT);
while(File1.read((char *)&P, sizeof(P)))
{
if( p.CheckCode( “DEL”))
File2.write((char *)&P, sizeof(P));
}
File1.close();
File2.close();
}