Telephone keypads have an international standard for mapping the alphabet to the

Question

Telephone keypads have an international standard for mapping the alphabet to the number keys. This can be seen in the image below: Write a program which can take a series of 10 letters and converts them to the corresponding phone number. Input Validation: bullet The input must be exactly 10 characters, no more, no less. Requirements: bullet The output must be formatted in the following format (###) ###-####. bullet You are NOT allowed to use loops or arrays. You may only use coding techniques found in chapters. bullet Your program must work for any input. Sample Output: Enter input: CODEISLIFE Phone Number: (263) 347-5433

Explanation / Answer

#include <cmath>
#include <iostream>
   using namespace std;
   int main()
  
   {
   // variable declaration.
   string letter;
   char wish_convert;
  
   cout<<"This Program will convert letters to thier corresponding telephone "
   "digit."<<endl;
   cout<<"Are you wish to convert letters into a telephone number."<<endl;
   cin>>wish_convert;
   cout<<endl;
   if(wish_convert == 'Y' || wish_convert == 'y'){
   cout<<"Please enter a letter: "<<endl;
   cin>>letter;
   cout<<endl;}
   else
   cout<<"Thank You."<<endl;   
   do {
   //Switch statement to determine number.
   switch (letter[0])
   {
   case 'A':
   case 'a':
   case 'B':
   case 'b':
   case 'C':
   case 'c':
   cout<<2<<endl;
   break;
   case 'D':
   case 'd':
   case 'E':
   case 'e':
   case 'F':
   case 'f':
   cout<<3<<endl;
   break;
   case 'G':
   case 'g':
   case 'H':
   case 'h':
   case 'I':
   case 'i':
   cout<<4<<endl;
   break;
   case 'J':
   case 'j':
   case 'K':
   case 'k':
   case 'L':
   case 'l':
   cout<<5<<endl;
   break;
   case 'M':
   case 'm':
   case 'N':
   case 'n':
   case 'O':
   case 'o':
   cout<<6<<endl;
   break;
   case 'P':
   case 'p':
   case 'Q':
   case 'q':
   case 'R':
   case 'r':
   case 'S':
   case 's':
   cout<<7<<endl;
   break;
   case 'T':
   case 't':
   case 'U':
   case 'u':
   case 'V':
   case 'v':
   cout<<8<<endl;
   break;
   case 'W':
   case 'w':
   case 'X':
   case 'x':
   case 'Y':
   case 'y':
   case 'Z':
   case 'z':
   cout<<9<<endl;
   break;
   }}
   while (letter[0,1,2,3,4,5,6,7,8,9] );
     
   system("Pause");
   return 0;
   }

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