Hi, this is my first time posting to this forum so please let me know if I'm doing anything wrong.
I'm fairly new here also, so I can't tell ya...But as a general rule, I think it is best if you try to search for things on your own before posting...
a. Write the internal representation of “17” in ASCII using two binary numbers
I'm not totally sure what you mean by this, but you can get the ASCII character codes by using the following code:
cout << (int)'1' << endl;
cout << (int)'7' << endl;
In fact, you can find out any character code by replacing the 1 or 7 with whatever character you like. Anyway, the above code will give you 49 and 55, respectively. So I suppose you need to write these numbers in binary...As for doing that, there are several algorithms (to do it by hand), which you can mimic using code (if you need to). I'm sure there is also probably some function written in some library in C++ that will auto convert for you, or you could write one yourself (do a search if you desire). Anyway, the following link explains a few "by hand" algorithms for converting decimal to binary:
http://www.wikihow.com/Convert-from-Decimal-to-Binary
b. Write 17 and -17 in two’s complement notation. Use 8 bits for each
Again, quick google search will reveal how two's complement works. Here you go:
http://en.wikipedia.org/wiki/Two's_complement
c. Write 0100101111112 in hexadecimal and 3F16 in binary
I would suggest doing this in two steps, converting first to base ten (decimal) in both cases, and then from decimal to the appropriate base. However, there are also ways of converting directly from hex to binary and vice versa. (Remember, hex is base 16, so maybe you can find a pattern between groups of 4 bits and their hex equivalents...sorry if that sounds cryptic but again, there are tons of references and algorithms on the net, so it would be redundant for me to explain here...)
Good luck!
