#include<iostream>
#include<stdio.h>
#include<math.h>
#include<stdlib.h>
using namespace std;
class phone
{
long int std, ex, phno;
public:
void accept();
void change();
void display();
};
void phone::accept()
{
cout<<"\n Enter STD Code : ";
cin>>std;
cout<<"\n Enter Exchange Code : ";
cin>>ex;
cout<<"\n Enter Phone Number : ";
cin>>phno;
}
void phone::display()
{
cout<<" ";
cout<<std<<"-"<<ex<<"-"<<phno;
}
void phone::change()
{
long int s, ph, rev, fact;
int cnt;
s = std;
ph = phno;
while(s!=0)
{
s=s/10;
cnt++;
}
fact=pow(10,(cnt-1));
std=std+fact;
while(ph!=0)
{
ph=ph/10;
cnt++;
}
fact=pow(10,(cnt-2));
rev=phno/fact;
rev=(rev%10)*10+rev/10;
phno=((rev*fact)+(phno%fact));
}
int main()
{
phone p1[10];
int cnt, i;
cout<<"\n Enter No. of Elements : ";
cin>>cnt;
if(cnt<1 || cnt>10)
{
cout<<"\n Out of size";
exit(0);
}
for(i=0; i<cnt; i++)
p1[i].accept();
cout<<"\n ------------------------------------------";
cout<<"\n Original Phone Number : ";
for(i=0; i<cnt; i++)
p1[i].display();
for(i=0; i<cnt; i++)
p1[i].change();
cout<<"\n Changed Phone Number : ";
for(i=0; i<cnt; i++)
p1[i].display();
return 0;
}
