Many companies use telphone numbers like 555-GET-FOOD so the number is easier fo

Question

Many companies use telphone numbers like 555-GET-FOOD so the number is easier for their customers to remember. On a standard telephone, the alphabetic letters are mapped to numbers in the following fashion

A, B, and C = 2

D, E, and F = 3

G, H, and I = 4

J, K, and L = 5

M, N, and L = 6

P, Q, R, and S = 7

T, U, and V = 8

W, X, Y, and Z = 9

Design a program that asks the user to enter a 10-character telephone number in the format XXX-XXX-XXXX. The program should display the telephone number with any alphabetic characters that appeared in the original translated to their numeric equivalent. For example, if the user enters 555-GET-FOOD the program should display 555-438-3663.

The design should be in modules. The first line of the function is:

Function String translatePhoneNumber( String Val phoneNumber )

main() will display the value returned from the function.

Explanation / Answer

import java.util.*;
public class Telephone
{public static void main(String[] args)
{String number;
int i;
System.out.print("Enter phone number: ");
Scanner in = new Scanner(System.in);
number = in.next();

i=0;
while(i<number.length())
    {switch(number.charAt(i))
     {case 'A':case 'B':case 'C':
          System.out.print("2");
          break;
      case 'D':case 'E':case 'F':
          System.out.print("3");
          break;
       case 'G':case 'H':case 'I':
          System.out.print("4");
          break;
        case 'J':case 'K':case 'L':
          System.out.print("5");
          break;
        case 'M':case 'N':case 'O':
          System.out.print("6");
          break;
        case 'P':case 'R':case 'S':
          System.out.print("7");
          break;
        case 'T':case 'U':case 'V':
          System.out.print("8");
          break;
        case 'W':case 'X':case 'Y':
          System.out.print("9");
          break;
        default:
           System.out.print(number.charAt(i));
        }
       i++;
       }        
}
}

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