implementing state machines using matlab function block in simulink

function matched = detect_1101(d_in)
start= 0;
found1=1;
found11=2;
found110=3;
   persistent state , state = x1_state(start, {x1unsigned, 2,0});
  matched = 0;
  
  
  switch state 
      
      case start
          if d_in ==1
              state = found1;
          else
              state =start;
          end
          
      case found1
          if d_in ==1
              state = found11 ;
          else
              state =start;
          end    
      case found11
          if d_in ==0
              state = found110;
          else
              state =found11;
          end
          
       case found110
          if d_in ==1
              state = found1;
              matched = 1;
          else
              state = start;
          end    
      otherwise
          state = start;
  end
  end

function [c] = test1(a, b)

switch a
case 0
c = a + b;
case 1
c = a – b;
end