 # Increasing and unsigned short will make it negative

I was working on the challenge for chapter 9, Pointers, when I faced an issue with shorts.

``` // Find the largest positive value of a signed short (integer) current = 0; current = 0; previous = 0; do { previous = current; current++; } while (current > previous); printf("The min value of a signed short is %d\n", current); ```
This would return -32768 but I expected the positive absolute of this number.
If each step would be printed, it would show something like:
current == 1
current == 2

current == 32768
step out of while loop since end has been reached.
result: current == -32768
Where does that minus sign come from here?

```// Find the largest negative value of a signed short (integer) current = 0; previous = 0; do { previous = current; current--; } while (current < previous); printf("The min value of a signed short is %d\n", current);```
This would return 32768, but I expected the negative of this value.

``` // Find the largest negative value of a unsigned short (integer) unsignedCurrent = 0; unsignedPrevious = 0; do { unsignedPrevious = unsignedCurrent; unsignedCurrent++; } while (unsignedCurrent > unsignedPrevious); printf("The max value of a unsigned short is %d\n", unsignedCurrent);```
This would return 0, but I expected a large positive number.

``` // Find the largest negative value of a signed short (integer) unsignedCurrent = 0; unsignedPrevious = 0; do { unsignedPrevious = unsignedCurrent; unsignedCurrent--; } while (unsignedCurrent < unsignedPrevious); printf("The min value of a unsigned short is %d\n\n", unsignedCurrent);```
This would return 65535, but I expected 0.

EDIT: corrected the result of the final example

[quote]``` // Find the largest negative value of a signed short (integer) unsignedCurrent = 0; unsignedPrevious = 0; do { unsignedPrevious = unsignedCurrent; unsignedCurrent--; } while (unsignedCurrent < unsignedPrevious); printf ("The min value of a unsigned short is %d\n\n", unsignedCurrent); ```[/quote]
What is the type of unsignedCurrent?

If it is unsigned, then use %u in stead of %d in printf; otherwise, the the value will be printed as a negative number if its most significant bit is set.