Anyone knows how to do this stupid problems with 2' compliment binary representation?

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  • spamofon
    Confirmed User
    • Jun 2003
    • 2999
    #1

    Anyone knows how to do this stupid problems with 2' compliment binary representation?



    please help with any u can! thanks
    questions:

    1.[14] a) Find the 16-bit 2?s complement binary representation of the decimal number 1243.

    b) Find the sign-and-magnitude binary representation of the decimal number -1243.


    c) Find the 16-bit 2?s complement binary representation of the decimal number -1243.



    2.[12] 100111100011001 represents a 16-bit 2?s complement binary number. What decimal number does it represent? (careful: count bits first)


    3. [12]10011101 represents a 8-bit 2?s complement binary number. What decimal number does it represent?


    4.[12] Add the following two 12-bit 2?s complement binary numbers. Give the answer in decimal.
    011001101111
    111010111011
    Tags: None
    • Arousal Design
      Confirmed User
      • Jun 2002
      • 1358
      #2
      1. 9124914
      2. North Dakota
      3. -2104^10 + McDonalds
      4. 1010110G.W.Bush01011000

      Hope that helps...

      Make Major Bank With Major Personality - NaughtyBank! Featuring NaughtyAllie and NaughtyJulie!

        Comment

        • dotwind
          Confirmed User
          • Dec 2003
          • 285
          #3
          homework? you better off learning how to do it than asking for an answer. it's not really that hard.
          Custom large/complex systems programing.<br>ASP.Net, C#, XML, MS SQL, WebServices(SOAP).<br>ICQ: 235719545

            Comment

            • spamofon
              Confirmed User
              • Jun 2003
              • 2999
              #4
              i am confused

              just need answers to compare

                Comment

                • hudson
                  Confirmed User
                  • Jul 2003
                  • 2948
                  #5
                  Originally posted by Arousal Design
                  1. 9124914
                  2. North Dakota
                  3. -2104^10 + McDonalds
                  4. 1010110G.W.Bush01011000

                  Hope that helps...
                  now there you go!

                    Comment

                    • winter
                      Confirmed User
                      • May 2001
                      • 570
                      #6
                      I learned that shit in cs354 here at uw-madison. its a bitch, but easy. read the book, and take notes in your lecture next time.

                        Comment

                        • tranza
                          ICQ: 197-556-237
                          • Jun 2003
                          • 57559
                          #7
                          Originally posted by Arousal Design
                          1. 9124914
                          2. North Dakota
                          3. -2104^10 + McDonalds
                          4. 1010110G.W.Bush01011000

                          Hope that helps...
                          I'm just a newbie.

                            Comment

                            • spamofon
                              Confirmed User
                              • Jun 2003
                              • 2999
                              #8

                                Comment

                                • spamofon
                                  Confirmed User
                                  • Jun 2003
                                  • 2999
                                  #9
                                  anyone else can help out?

                                    Comment

                                    • spamofon
                                      Confirmed User
                                      • Jun 2003
                                      • 2999
                                      #10
                                      50 buks paypal who does it lol

                                        Comment

                                        • spamofon
                                          Confirmed User
                                          • Jun 2003
                                          • 2999
                                          #11

                                            Comment

                                            • Cyborg69
                                              So Fucking Banned
                                              • Apr 2002
                                              • 932
                                              #12
                                              a) Find the 16-bit 2haha146;s complement binary representation of the decimal number 432.


                                              0000000110110000


                                              b) Find the sign-and-magnitude binary representation of the decimal number -432.


                                              1110110000


                                              c) Find the 16-bit 2haha146;s complement binary representation of the decimal number -432.


                                              0000000110110000

                                              0000000110110000

                                              flip

                                              1111111001001111

                                              +1

                                              1111111001010000

                                                Comment

                                                • Cyborg69
                                                  So Fucking Banned
                                                  • Apr 2002
                                                  • 932
                                                  #13
                                                  2.[10] 100110100001101 represents a 16-bit 2?s complement binary number. What decimal number does it represent? (careful: count bits first)

                                                  100110100001101 it is 15 bits, we need to add one 0 and it will be positive

                                                  0100110100001101

                                                  the answers is 19725

                                                  3. [10] 10001010 represents a 8-bit 2?s complement binary number. What decimal number does it represent?
                                                  10001010 is negative,
                                                  first flip and after that add 1
                                                  011110101
                                                  +1
                                                  011110110
                                                  it is positive
                                                  the answers is 246

                                                  4.[10] Add the following two 12-bit 2?s complement binary numbers. Give the answer in decimal.
                                                  011001100110
                                                  101011111011

                                                  the answer is 353

                                                    Comment

                                                    • [Dan]
                                                      Confirmed User
                                                      • Oct 2001
                                                      • 143
                                                      #14
                                                      humm humm it's been a while.. As far as I can remember, a 2's complement binary number is found by reversing all the bits of the number, and then adding 1.

                                                      I.e.: You have 01000001 (33 in decimal)
                                                      You reverse all the bits = 10111110
                                                      Then add 1 = 10111111 (191 in decimal)

                                                      Don't take my word for it though. Just a little hint hopefully. I'm too lazy to find my books and search for the answer ;)

                                                        Comment

                                                        • [Dan]
                                                          Confirmed User
                                                          • Oct 2001
                                                          • 143
                                                          #15
                                                          Ohh well Cyborg was faster than me.. Good job ;)

                                                            Comment

                                                            • spamofon
                                                              Confirmed User
                                                              • Jun 2003
                                                              • 2999
                                                              #16
                                                              it is all clear to me now!
                                                              once again gfy saves the day!

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