[exopaladin@brain Desktop]$ javac Coursework2.java 
Coursework2.java:11: cannot find symbol
symbol  : variable length
location: class java.lang.String
                int counter = b.length-1;
                               ^
Coursework2.java:26: cannot find symbol
symbol  : method pow(int,int)
location: class Coursework2
                                        p = pow(2,counter);
                                            ^
Coursework2.java:27: binTodec(java.lang.String) in Coursework2 cannot be applied to (int)
                                        return result += p + binTodec(--counter);
                                                             ^
Coursework2.java:27: operator + cannot be applied to int,binTodec
                                        return result += p + binTodec(--counter);
                                                         ^
Coursework2.java:27: inconvertible types
found   : <nulltype>
required: int
                                        return result += p + binTodec(--counter);
                                                           ^
Coursework2.java:31: binTodec(java.lang.String) in Coursework2 cannot be applied to (int)
                                        return result += binTodec(--counter);
                                                         ^
Coursework2.java:31: inconvertible types
found   : <nulltype>
required: int
                                        return result += binTodec(--counter);
                                                                 ^
7 errors