151 as an 8-bit signed binary number

Question

Converting base 10 to base 2 n = 8

A= 49 B= 151

By doing so 49 is 00110001 and -49 would be 11001111.

I am having problems with finding 151 and -151 because after the conversion it is already an 8-bit number. 151 is 10010111, but in signed binary doesn't the farthest left digit indicate whether its negative or positive. 1 is negative and I am trying to get positive 151, but within 8-bits. How would I go about this?

Answer 1

如果只有8位，则您的无符号范围是0到255，这使您的有符号范围为-128到127。因此，仅8位不能将-151或151表示为有符号数。