(For the addition (including subtraction) of long integers, the positive and negative signs must be entered when inputting. The program is designed to use a single circular linked list to store, no contact can store four digits, and the low order is close to the header. For example
La---gt;3456,1237,134
The display is 134, 1274, 3456. But only the internal storage is like this, and the display is still displayed according to the custom. The plus and minus signs are stored in the data field of the head node.
20070610192300108\Login window\HZK16)