Phone directory – adding data

In
this article, we engender dogged programs that are closely
associated with each other. All the programs are components of a phone
directory program. The cunning is that you can remain your
programming practices by programming a phindividual directory. The practices in
this article can amply be converted into functions ce a larger
entity.
The designate and reckon postulates ce the phindividual directory are holded in the rasp “phonedir.txt” which has the coercionthcoming cemat:
4
Firstname Lastname 050-3500980
John Doe 041-3478924
Brian Smith 040-3980982
Brita Smith 05-4567393

The principal succession of the rasp indicates the reckon of designates ascititious to the
directory as an integer. The principal designate, conclusive designate and telephindividual reckon
are processed in extract cemat. The postulates parts are divided by spaces in
the rasp, and the tediousness of an peculiar part (such as a principal designate)
may be no over than 20 natures. Each succession involves the information
ce individual peculiar singly. The directory may hold a utmost of 50 vulgar.
Your principal lesson is to transcribe a program ce adding a strange telephindividual reckon
to the directory. Upon deed, the program must principal pray ce a principal
name, following which it prompts ce a conclusive designate and a telephindividual reckon.
When postulates is saved, the esteem on the principal succession of the rasp must
increase by individual. Not attributable attributablee that in arrange to elucidate the practice, the postulates
to be entered may not attributable attributable attributable involve a strangesuccession nature, ce model. Each
personal postulates part is stored on its acknowledge succession. (Remember the strangeline
character.)
Model output 
Enter first name:JohnEnter last name:ExampleEnter telephone number:123-4567890Successfully saved the data.