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Leap, Difference of Squares, Grains, Collatz Conjecture, Queen Attack, Darts, Hamming, and Space Age completed yesterday. Binary and Linked List completed today. |
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| .exercism | ||
| test-framework | ||
| HELP.md | ||
| makefile | ||
| phone_number.c | ||
| phone_number.h | ||
| README.md | ||
| test_phone_number.c | ||
Phone Number
Welcome to Phone Number on Exercism's C Track.
If you need help running the tests or submitting your code, check out HELP.md.
Instructions
Clean up user-entered phone numbers so that they can be sent SMS messages.
The North American Numbering Plan (NANP) is a telephone numbering system used by many countries in North America like the United States, Canada or Bermuda. All NANP-countries share the same international country code: 1.
NANP numbers are ten-digit numbers consisting of a three-digit Numbering Plan Area code, commonly known as area code, followed by a seven-digit local number. The first three digits of the local number represent the exchange code, followed by the unique four-digit number which is the subscriber number.
The format is usually represented as
(NXX)-NXX-XXXX
where N is any digit from 2 through 9 and X is any digit from 0 through 9.
Your task is to clean up differently formatted telephone numbers by removing punctuation and the country code (1) if present.
For example, the inputs
+1 (613)-995-0253613-995-02531 613 995 0253613.995.0253
should all produce the output
6139950253
Note: As this exercise only deals with telephone numbers used in NANP-countries, only 1 is considered a valid country code.
Source
Created by
- @RealBarrettBrown
Contributed to by
- @bcc32
- @Gamecock
- @gea-migration
- @h-3-0
- @mikewalker
- @patricksjackson
- @QLaille
- @ryanplusplus
- @wolf99
Based on
Event Manager by JumpstartLab - http://tutorials.jumpstartlab.com/projects/eventmanager.html