On ancient rotary telephones each letter of the alphabet exc

On ancient rotary telephones each letter of the alphabet (except Q and Z) was paired with one of the dial-able numbers 2 through 9 according to the following table: The number 0 was used to contact the operator, and the number 1 was used to begin a long-distance call, so they were not paired with any letters. The * and # symbols were also reserved for special uses and were thus not paired with any letters. Using the letter-number pairings from the table, people and businesses were able to make their phone numbers easier to remember. For example, to call Wells Fargo bank, you can dial 1-800-T0-WELLS, or a local animal shelter might have the number (FUN) DOG-N-CAT. Your job here is to write a Matlab function called how2call.m which takes a string wacky representing a phone number (and which may contain only upper-case letters, numbers, spaces, parentheses, and hyphens) and does the following: strips off the leading 1 (if one Is present in wacky) bullet changes the upper-case letters to numbers according to the table above bullet removes all spaces, hyphens, and parentheses bullet returns the phone number boring in the format (XXX) XXX-XXXX (where there is a space between the area code in parentheses and the beginning of the first 3 digit grouping). The specifications for the function and some sample function calls are shown below.

Solution

function [boring] = how2call(wacky)
l=size(wacky,2);
disp(l);
res(1:10)=\'0\';
i=1;
for j=1:l
if wacky(j)==\'A\'|| wacky(j)==\'B\'|| wacky(j)==\'C\'
res(i)=\'2\';
i=i+1;
end
if wacky(j)==\'D\'|| wacky(j)==\'E\'|| wacky(j)==\'F\'
res(i)=\'3\';
i=i+1;
end
if wacky(j)==\'G\'|| wacky(j)==\'H\'|| wacky(j)==\'I\'
res(i)=\'4\';
i=i+1;
end
if wacky(j)==\'J\'|| wacky(j)==\'K\'|| wacky(j)==\'L\'
res(i)=\'5\';
i=i+1;
end
if wacky(j)==\'M\'|| wacky(j)==\'N\'|| wacky(j)==\'O\'
res(i)=\'6\';
i=i+1;
end
if wacky(j)==\'P\'|| wacky(j)==\'S\'|| wacky(j)==\'R\'
res(i)=\'7\';
i=i+1;
end
if wacky(j)==\'V\'|| wacky(j)==\'T\'|| wacky(j)==\'U\'
res(i)=\'8\';
i=i+1;
end
if wacky(j)==\'X\'|| wacky(j)==\'W\'|| wacky(j)==\'Y\'
res(i)=\'9\';
i=i+1;
end
if wacky(j)==\'0\' || wacky(j)==\'2\' || wacky(j)==\'3\' ||wacky(j)==\'4\' || wacky(j)==\'5\' ||wacky(j)==\'6\' || wacky(j)==\'7\' ||wacky(j)==\'8\' || wacky(j)==\'9\'
res(i)=wacky(j);
i=i+1;
end
if wacky(j)==\'-\' || wacky(j)==\'1\' || wacky(j)==\' \' || wacky(j)==\'Q\' || wacky(j)==\'Z\'
end
  
end
disp(res);
temp1=res(1:3);
temp2=res(4:6);
temp3=res(7:10);
boring=[\'(\' temp1 \') \' temp2 \'-\' temp3];