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Error in converting decimal to binary

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Pat
Pat 2012-12-21
a=[-5;5]
b=dec2bin(2^4+a);
b =
01011
10101
I get error for 5
b= dec2bin(mod(2^6+a,2^6))
I get
111011
000101
Why do I get values like this and where is the error made?
i have values like a=[-145 1 -2 10 199 51 -4]

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回答（1 个）

Doug Hull
Doug Hull 2012-12-21
>> a = [-5; 5];
middle = 2^4+a
dec2bin(middle)
middle =
11
21
ans =
01011
10101
I suspect that middle is not what you expected it to be.
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Pat
Pat 2012-12-21
how to convert a=[-145 1 -2 10 199 51 -4] to binary,
Walter Roberson
Walter Roberson 2012-12-21
There are three distinct common ways to represent negative numbers in binary. You need to choose: separate sign; one's complement; two's complement.

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