How many phone numbers are possible within the (310) area code if the first number is restricted to 2.
How many phone numbers are possible within the (310) area code if the first number is...
19) A) How many different area code 909 telephone numbers are possible? Assume that the first digit of any phone number cannot be 0 or 1. )
Write a program **(IN C)** that displays all the phone numbers in a file that match the area code that the user is searching for. The program prompts the user to enter the phone number and the name of a file. The program writes the matching phone numbers to the output file. For example, Enter the file name: phone_numbers.txt Enter the area code: 813 Output: encoded words are written to file: 813_phone_numbers.txt The program reads the content of the file...
Please do question 19 and 27. Please show all work 19) A) How many different area code 909 telephone numbers are possible? Assume that the first digit of any phone number cannot be 0 or 1. ) B) Suppose a computer requires eight characters for a password. The first three characters must be letters and the remaining five characters must be numbers. How many passwords are possible? 27) In how many ways can 8 people be arranged for a photograph...
10. AU.S. phone number consists of three sections: (1) Area code (null or three digits); (2) prefix code (three digits); and (3) postfix code (four digits). Area code - it can be null or consists of three digits Prefix code - it consists of three digits with non-ZERO or non-ONE as the first digit in the Prefix code section, i.e. 334-123-4567 is invalid because the first digit in the Prefix code is ONE. Postfix code - it consists of four...
Please write a program to find the area code, exchange code, and the user number from any phone number (i.e., 10 digits) entered by the user. [hints: assume the common phone number format (3 digits area code)-(3 digits exchange code)-(4 digits user number)] in C language.
*Note: Include the following set of comments at the top of your source code for all assignments A small private elementary school would like to hire you to write a C++ program that stores students’ emergency phone numbers for school purposes. The students’ are required to provide the school with 3 phone numbers in case of an emergency. a. Phone: Specify a structure named Phone to store the area code (ex. 501), prefix (ex. 336), and last four digits of...
A phone number is an ordered string of ten digits. Each digit is one of 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9. (a) How many phone numbers are there that do not contain any zeros? (b) How many phone numbers are there that start with 216 or 440? (c) How many phone numbers are there that start or end with 3? (d) What is the smallest number of phone numbers that guarantee at least nine of...
8. (6 points) How many six-digit numbers with a possible leading zero, but no repeated numbers are there if the digits 7 and 8 must appear in the number and must be next to each other?
An application on your phone requires a 4-letter password. How many different possible passwords are there?
in an input field, how can I check that the phone number contains only numbers and + - () and space? I use SIMPLE javascript and HTML.