Article ID: 38027
Article Last Modified on 7/5/2005
APPLIES TO
- Microsoft Visual C++ 1.0 Professional Edition
- Microsoft Visual C++ 1.5 Professional Edition
- Microsoft Visual C++ 1.0 Professional Edition
- Microsoft Visual C++ 2.0 Professional Edition
- Microsoft Visual C++ 4.0 Standard Edition
- Microsoft Visual C++ 5.0 Standard Edition
- Microsoft Visual C++ 6.0 Service Pack 5
This article was previously published under Q38027
SUMMARY
In most C compilers, including the Microsoft C Compiler, negative values are represented internally in two's complement format. Two's complement can be obtained by negating each bit of the value, then adding 1. Performing two's complement twice generates the original value.
The following is an example:
Original Value Two's Complement
-------------- ----------------
(dec) (hex) (binary) (dec) (hex) (binary)
127 0x7f 01111111 -127 0x81 10000001
111 0x6f 01101111 -111 0x91 10010001
-111 0x91 10010001 111 0x6f 01101111
Additional query words: 8.00 8.00c 9.00
Keywords: kbinfo kbcompiler KB38027
