Matlab and arduino Serial communication

Hello everyone I am using arduino UNO with Matlab and I want to do a communication between them without using support package. Now the code that I wrote in arduino is:

arduino CODE//-----------------------

int a=1;

int b=0;

void setup() {

// put your setup code here, to run once:

Serial.begin(9600);

}

void loop() {

// put your main code here, to run repeatedly:

Serial.println(a);

Serial.println(b);

while (Serial.available()==0)

{}

if (Serial.read()>0)

{

    b=Serial.read();}

}

------------------------------- and the Matlab code Matlab code//----------------- clc

clear all

s=serial('COM5','BAUD',9600);

fopen(s);

for m=1:50

   z=fscanf(s)

   g=z;

   fprintf(s,50);

end

fclose(s);

clear all

close all

delete all

--------------------------------

Now I should expect the Command window in matlab to show me

1

0

1

50

1

50

1

50

....

but it get me

1

10

1

10

1

50

1

50

..

and sometimes instead of 10 it gives me -1

WHAT IS ITS PROBLEM?!