Problem - Kevin Tafuro

This function takes the following arguments:
prefix
String to be printed in front of the hexadecimal output. Subsequent lines of output
are indented appropriately.
str
String to be printed, in binary. It is represented as an unsigned char * to make
the code simpler. The caller will probably want to cast, or it can be easily rewritten
to be a void *, which would require this code to cast this argument to a bytebased
type for the array indexing to work correctly.
len
Number of bytes to print.
This function prints out bytes as two characters, and it pairs bytes in groups of four.
It will also print only 16 bytes per line. Modifying the appropriate preprocessor declarations
at the top easily changes those parameters.
Currently, this function writes to the standard output, but it can be modified to return
a malloc( )’d string quite easily using sprintf( ) and putc( ) instead of printf( ) and
putchar( ).
In C++, you can print any data object in hexadecimal by setting the flag ios::hex
using the setf( ) method on ostream objects (the unsetf( ) method can be used to
clear flags). You might also want the values to print in all uppercase, in which case
you should set the ios::uppercase flag. If you want a leading “0x” to print to denote
hexadecimal, also set the flag ios::showbase. For example:
cout.setf(ios::hex | ios::uppercase | ios::showbase);
cout