Example code illustrating simple pointers

• code_with_pointers.cpp: Running this produces something like

          Value pointer's value: b5527ffc24
          What value pointer points *at*, before multiplying: 7
          7 times 8 = 56
          Enter divisor: 3
          After dividing by 3, some number is 20
          Address of some_number: b5527ffc20
            ... and its pointer:  b5527ffc20
          Value pointer's value: b5527ffc20
          What value pointer points *at*, before multiplying: 20
          At end, number is 160
  

  Note you will often get a different address on each run because putting data at the different addresses increases security.
• code_with_pointers.s: compling the .cpp with the -S -O options