Question

I have a program written in C++ that ask a user to enter his/her 11 digit
mobile number. But when I enter the 11 digits, the program continue without
executing the succeding code.

 string FriendName, FriendAdd,  EmailAdd;
 long MobileNumber, counter, counter1, counter2;
 //Create a new structure
 struct personData {
   string namePerson, addressPerson, emailAddress;
   long age;
   struct personData *next;
 };

//Initialize pointers to personData structure
typedef struct personData node;

node *firstRec, *currentRec, *tempRec, *tempRec2;

void InsertRec() {
  cin.ignore(200,'\n');

  cout<<"Enter your Friend's Name            : ";
  cin.ignore(1,'\n');
  getline(cin,FriendName);
  cout<<"Enter your Friend's Mobile Number   : ";
  cin>>MobileNumber;
  cout<<"Enter your Friend's Address         : ";
  cin.ignore(1,'\n');
  getline(cin,FriendAdd);
  cout<<"Enter your Friend's Email Add       : ";
  getline(cin,EmailAdd);
  cout<<endl<<endl;

  tempRec = new(personData);
  tempRec->namePerson = FriendName;
  tempRec->addressPerson = FriendAdd;
  tempRec->emailAddress = EmailAdd;
  tempRec->age = MobileNumber;
  tempRec->next=firstRec;
  //firstRec->next=tempRec;

  firstRec=tempRec;
}

Answer 1

The size of integral types depends on target platform and compiler settings. Assuming that long is a 32-bit integer, it only supports 10 digits.

The maximum values for 32-bit integral types are:

signed: -2147483647 to 2147483647
unsigned: 0 to 4294967295

A better approach would be to store the mobile number as a string, not a number.