I am studying the following function:
inline xint dtally(xint x)
{
xint t = 0;
while (x) t += 1 << ((x % 10) * 6), x /= 10;
return t;
}
I just want to know what makes this feature i.e. which computes and stored in the variable t.
Trying to understand an inline function
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This counts the number of base 10 digits in the number
xint, separated by 6-width bit fields.Note that each shift length is a multiple of 6. So if a digit is 0 the shift is 0, if the digit is 1 the shift is 6, if the digit is 9 the shift is 54, and so forth.
The reason 6 is used I think is so it fits under 64 bits.