Page 132 - C++

Ans: Statement 1: a.updatemobile();

Statement 2: f.seekp( updt *sizeof(a), ios::beg);

b) Assuming that a text file named FIRST.TXT contains some text written into

it, write a function named countAE(), that reads the file FIRST.TXT and

counts and display the occurrence of alphabet ‘A’ and ‘E’ ( both cases). 2
Ans: void countae()
{ int n=0;
ifstream if1;

if1.open(“FIRST.TXT”);
char ch;
while(! if1.eof())
{ ch=if1.getch();
if( ch==’A’ || ch==’E’)
n++;

}
if1.close();
cout<<” Number of A/E is “<<n;

c) Given a binary file “TOYS.DAT” containing records of TOYS. Consider the
class given below. Display those toys which are meant for children of age

range “5 to 8” 3
class TOYS
{ int toycode;
char toyname[20];
char agerange[10];
public:
void enter()
{ cin>>toycode;
gets(toyname);
gets(agerange);
}
void display()
{cout<<toycode<<”:”<<toyname<<” :” <<agerange<<endl; }

char *whatage()
{ return agerange; }
};
Ans: void displaytoys()
{
ifstream if1;
if1.open(“TOYS.DAT”, ios:;binary);

XII / Comp. Sc. Page 11 of 17