Bitwise Operations?

[DDAVE2010]

I currently have the display method down, but I am not sure where to go with the main method...

Write a program that uses bitwise operations to: (1) generate and display all power-of-two number in the range +128 to -128 and (2) dispaly an arbitrary user-input integer.

main method:
*declare int number = 128: got this
*include a while loop that loops while number is >=-128: I think i have this
*call the display method, which prints the value of its passed-in number parameter.
*if number is greater than zero, use the >>= operator to do one arithmetic right shift
*if number equals zero, use the ~ oeprator to complement it.
* if number is less than zero, use the <<= operator to do one left shift.
* after the while loop, ask the user to input any number, and call the display method to print that number.

Any sort of help would be greatly appreciated!

[JosAH]

@DDAVE2010
First of all: there are no negative numbers that are also a power of two. The way I understand those steps is:

for (int num= 128; num >= -128; ) {
   print(num);
   // if num > 0 shift it to the right one position
   // else if num == 0 invert all its bits
   // else (num < 0) shift it to the left one position
}
 

You get the sequence: 128, 64, 32, 16, 8, 4, 2, 1, 0, -1, -2, -4, -8, -16, -32, -64, -128

kind regards,

Jos