Why is the IEEE standard float the largest integer 2 ^ 2 ^ 128-104?

CodePudding user response:

Where did you see the data?
Since is a floating point number, why there are the largest integer said today (Monday)?
If refers to the index is 0, tail part of the float is only 23, 2 ^ 128 poor too far away from you
Even double precision and the expansion of double precision, tail, there were fewer than 128

CodePudding user response:

I also calculate the results

CodePudding user response:

The biggest float is 0 x7f7fffff, exponent 0 xfe - 127=127, mantissa (1) FFFFFE, said 1. FFFFFE * 2 ^ 127, move the mantissa left 23, exponent reduction get 0 XFFFFFF * 2 ^ 104, 23 is 2 ^ 2 ^ 128-104