ممكن احد يفهمني في Overflow و Underflow في هذا الموضوع

السلام وعليكم

اخواني انا اتعلم من كتاب انجليزي في ++c كل شئ تمام

لكن هناك امر لم اعرفه مسالة Over و Under في هذا الموضوع

------------------------------------ الموضوع --------------------------------------------------

The program sets a short variable (sam) and an unsigned short variable (sue) to the

largest short value, which is 32,767 on our system.Then it adds 1 to each value.This

causes no problems for sue because the new value is still much less than the maximum

value for an unsigned integer. But sam goes from 32,767 to –32,768! Similarly, subtracting

1 from 0 creates no problems for sam, but it makes the unsigned variable sue go from 0 to

65,535.As you can see, these integers behave much like an odometer. If you go past the

limit, the values just start over at the other end of the range (see Figure 3.1). C++ guarantees

that unsigned types behave in this fashion. However, C++ doesn’t guarantee that

signed integer types can exceed their limits (overflow and underflow) without complaint,

but that is the most common behavior on current implementations.

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