Concept explainers
Videos
(Telephone-Number Word Generator) Standard telephone keypads contain the digits 0–9. The numbers 2–9 each have three letters associated with them, as is indicated by the following table:
Many people find it difficult to memorize phone numbers, so they use the correspondence between digits and letters to develop seven-letter words that correspond to their phone numbers. For example, a person whose telephone number is 686-2377 might use the correspondence indicated in the above table to develop the seven-letter word UNUMBERS.”
Businesses frequently attempt to get telephone numbers that are easy for their clients to remember. If a business can advertise a simple word for its customers to dial, then, no doubt, the business will receive a few more calls.
Each seven-letter word corresponds to exactly one seven-digit telephone number. The restaurant wishing to increase its take-home business could surely do so with the number 825-3688 (i.e., “TAKEOUT’).
Each seven-digit phone number corresponds to many separate seven-letter words. Unfortunately, most of these represent unrecognizable juxtapositions of letters. It’s possible, however, that the owner of a barber shop would be pleased to know that the shop’s telephone number, 424-7288, corresponds to “HAIRCUT.” The owner of a liquor store would, no doubt, be delighted to find that the store’s telephone number, 233-7226, corresponds to “BEERCAN.” A veterinarian with the phone number 738-2273 would be pleased to know that the number corresponds to the letters “PETCARE.”
Write a C program that, given a seven-digit number, writes to a file every possible seven-letter word corresponding to that number. There are 2187 (3 to the seventh power) such words. Avoid phone numbers with the digits 0 and 1.
Want to see the full answer?
Check out a sample textbook solution
Chapter 11 Solutions
C How To Program, Global Edition
- Ninth Edition Determine Zi, Zo and Av 20 V Zi + 1 ΜΩ 2 ΚΩ HH Z IDSS= 6MA Vp=-6V Yos = 40μS 20 and 47arrow_forwardWhat is the worst case time complexity of the following algorithm for i = 1 to x do for j = 2^((i-1)x) to 2^(in) do print(i,j)arrow_forwardProve for each pair of expression f(n) and g(n) whether f(n) is big O, little o Ω,ω or Θ of g(n). For each case it is possible that more than one of these conditions is satisfied:1. f(n) =log(n2^n), g(n) = log(sqrt(n)2^(n^2))2. f(n) =nsqrt(n) +log(n^n), g(n) =n + sqrt(n)lognarrow_forward
- I need to make a parallel version of this sequential codearrow_forwardI need to make a parallel version of this sequential code.arrow_forwardBenefits of using arrays as instance variables: What are the advantages of incorporating arrays as instance variables within a class? Initializing and managing arrays: How do you initialize and manage arrays within class constructors and mutators (setters)? Example of using arrays as instance variables: Share an example where you have used arrays as instance variables and discuss its application in a real-world scenario. Common mistakes with arrays as instance variables: What are some common mistakes to avoid when working with arrays as instance variables? Information hiding violations: What is the potential violation of information hiding when using arrays as instance variables? How can this be resolved?arrow_forward
- Do you think that computers should replace teachers? Give three references with your answer.arrow_forwardIs online learning or face to face learning better to teach students around the around the world? Give reasons for your answer and provide two references with your response. What are benefits of both online learning and face to face learning ? Give two references with your answer. How does online learning and face to face learning affects students around the world? Give two references with your answer.arrow_forwardExplain Five reasons if computers should replace teachers. Provide three references with your answer. List three advantages and three disadvantages face to face learning and online learning may have on children. Provide two references with your answer.arrow_forward
- You were requested to design IP addresses for the following network using the address block 10.10.10.0/24. Specify an address and net mask for each network and router interfacearrow_forwardFor the following network, propose routing tables in each of the routers R1 to R5arrow_forwardFor the following network, propose routing tables in each of the routers R1 to R5arrow_forward
C++ Programming: From Problem Analysis to Program...Computer ScienceISBN:9781337102087Author:D. S. MalikPublisher:Cengage Learning
C++ for Engineers and ScientistsComputer ScienceISBN:9781133187844Author:Bronson, Gary J.Publisher:Course Technology Ptr
Microsoft Visual C#Computer ScienceISBN:9781337102100Author:Joyce, Farrell.Publisher:Cengage Learning,
EBK JAVA PROGRAMMINGComputer ScienceISBN:9781337671385Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENT
Systems ArchitectureComputer ScienceISBN:9781305080195Author:Stephen D. BurdPublisher:Cengage Learning
Programming Logic & Design ComprehensiveComputer ScienceISBN:9781337669405Author:FARRELLPublisher:Cengage