Comments on: Why computers represent signed integers using two’s complement

By: Hermawan Wiwit

2017年11月04日 12:28:51 +0000

Easy to understand. Thanks, but can the computer know the input except for the binary number?

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By: Qian

2017年4月27日 15:55:44 +0000

It is so wonderful! So clear and easy to understand!

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By: Anonymous

2016年7月19日 04:38:21 +0000

thanks a lot for it is so helpful for me.

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By: Gimi

2016年5月29日 17:27:15 +0000

Can you please explain why one’s complement is not suitable for signed integers?

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By: owen zhang

2015年11月15日 00:59:19 +0000

Very helpful! The article help me a lot, thx.

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By: Ankit

2015年7月03日 16:45:20 +0000

Thanks from India!

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By: Phil Wilson

2015年4月18日 08:24:38 +0000

Hi Igor,

This brings back memories, I wrote the C runtime library to support the packed decimal (Binary Coded Decimal BCD) data type on the mainframe, every time someone wrote a line of code in C using the packed data type it ran my cod). This data type had 64 digit precision and I had to go back to grass roots maths to write it. I would have to say this was one of the most satisfying projects I worked on. This was such a challenge, I had to write all of the routines to convert from packed to float, float to packed etc etc I loved it. The hardest routine was division, I ended up using using recursive subtraction to work this out. All in assembler.

Phil.

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By: Gramse

2012年11月14日 06:48:07 +0000

how do you represent the wordS ‘good morning’ in ASCII?

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By: Wang Li

2012年3月14日 01:16:07 +0000

Thanks,from China.

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By: Les Sohay

2011年5月02日 22:56:00 +0000

Hello Igor

Can you tell me how many addition a computer do while an identical computer performs the following operation, using two’s complements? tHAKS FOR YOUR HELP. Les

SUBTRACTING A LARGER NEGATIVE NUMBER FROM A SMALLER NEGATIVE NUMBER:
(–A)–(–B)=C (–3)–(–5)=2

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