unsigned char

• Abstract:See the code below.

       #include <limits.h>
       #include <iostream>
       int main()
       {
           for(unsigned char ch = 0; ch <= UCHAR_MAX; ++ch){
                std::cout << (int)ch << std::endl;
           }
       }
       

  Can you see the bug?
• The bug is overflow. This loop never stops. You can just compile and try it. When the ch comes UCHAR_MAX, ++ch becomes 0 by overflow.