How to get the number of digits of a floating-point variable with a value?

血色占卜师

As the title

深蓝旅者

float 4 bytes
double 8 bytes
There is no way to know the number of digits after the decimal point

血色占卜师

I have a way:
000 .... 1
000 ... 01
    .
    .
    .
1000000
Perform a bitwise AND operation with a floating point number. When you get zero, you will reach the highest bit, and you can know the number of digits. I do n’t know if it works. It seems more troublesome. I wonder if there is any function that directly returns the number of digits?

血色占卜师

It is easy to judge after converting to CString

vashkuka

No ready-made functions available
You can only write functions yourself

powerming

Convert it to a string type first, and then use getlength.

从后面上

Digits? The number of digits in the system is set. This is set.
Float is 32-bit under 32-bit system
1 digit for the number, 8 digits for the order code, and 23 suffix codes;