MATLAB: Need help with conversion program

conversion script

Need help creating a program that is capable of converting from cm or in or ft into units of cm or in or ft. If incorrect units are input by the program user print an appropriate message and do not perform conversion.
ex] Command window should prompt 3 times:
Enter the Input Distance: 1
Enter the input Units(cm,in,ft): ft
Enter output units to convert to(cm,in,ft): in
1 ft = 12 in
ex]
Enter the Input Distance: 1
Enter the input Units(cm,in,ft): x
Incorrect input units
Thanks

Best Answer

There can be many solutions for this, smaller one also, but for a beginner level, this will sure work for you.
d= input('Enter the Input Distance: ');
  i= input('Enter the input Units(cm,in,ft): ');
  o= input('Enter output units to convert to(cm,in,ft): ');
  switch i
      case 'cm'
          if o=='in'
              x=d/2.54;
          else
              if o=='ft'
                  x=d/30.48;
              else 
                  if o=='cm'
                      x=d;
                  end
              end
          end
      case 'in'
          if o=='in'
              x=d;
          else
              if o=='ft'
                  x=d/12;
              else 
                  if o=='cm'
                      x=2.54*d;
                  end
              end
          end
        case 'ft'
            if o=='in'
                x=d*12;
            else
                if o=='ft'
                    x=d;
                else 
                    if o=='cm'
                        x=d*30.48;
                    end
                end
            end
            str = fprintf('%d %s = %d %s',d,i,x,o);
    otherwise
        disp('wrong input');
    end
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