Matlab - program won't stop calculating

My program I created is using a simple bisection method to calculate a root, but it just keeps running. Any thoughts on how to fix my code to stop this?

myFunction = @(x) 9*(x^4) + 18*(x^3) + 38*(x^2) - 57*x +14;
format long
a = 0; % lower limit
b = 1; % upper limit
c = (a + b) / 2;

while abs(myFunction(c)) > 0.01
    if (myFunction(a)*myFunction(c)) < 0
        a = c;
    else
        b = c;
    end
    c = (a + b) / 2;
end

fprint('The root is %g\n', c)

Answer 1

[Matt J]

Install a maximum number of iterations. You should be able to reach 2^(-N) precision in N steps. Additionally,

    if (myFunction(a)*myFunction(c)) < 0
        b = c;
    elseif (myFunction(b)*myFunction(c)) < 0

        a = c;
    else

       ....something  

    end