2021-12-10: which can represent a 64 bit floating point number or a 64 bit signed integer

2021-12-10：64 Bit floating-point numbers and 64 Signed integer of bit , Which can represent more data ？

A. Integer multiple .

B. Floating point multiple .

C. Platform related .

D. Just as much .

come from qq Group .

answer 2021-12-10：

Answer selection A.

analysis ： At first glance , It looks like a floating point number , But it's just that floating-point types have a larger range than integers .

No matter what type of data , At best 2 Of 64 Power .

For integers ： It's just enough to count , Yes 2 Of 64 Power .

For floating point :

situation 1：0 and -0 Is different in memory , But the value is the same .

situation 2： If it refers to all bits of the digital area 1, And the decimal places are not 0, This number is expressed as not a number （NaN）.

In both cases , Causes the number of floating-point numbers to be less than 2 Of 64 Power .

So the answer is A.