![]() ![]() ![]() Read only macro in c how to#The expression for this would be: (value > 1) & 7īoth approaches involve the same amount of complexity, and therefore will not differ in performance.Ģ - how to write a 3 bit value starting from the second bit: This approach is similar, but the order of operations is reversed, meaning the original value is shifted and then masked with 00000111 (7) to only leave the last 3 bits: _ The expression for this would be: (value & 14) > 1 Do you mean save it elsewhere, assigning the macros, and then overwriting the old document Sub QSD () ' ' QSD Macro ' Macro recorded by PMI ' Selection. So let the initial value be 10111011 (187 decimal) which will be a little more illustrative of the process.ġ - how to read a 3 bit value starting from the second bit: _ > 1 = I recorded it rather than actually typing it in. Macros are commonly used in C-style programming to define compile-time constant values. std::vector and other Standard Library containers. Some 2+ years after I asked this question I'd like to explain it the way I'd want it explained back when I was still a complete newb and would be most beneficial to people who want to understand the process.įirst of all, forget the "11111111" example value, which is not really all that suited for the visual explanation of the process. When passing a string to a function that requires only read-only access, in C++17 you can use std::stringview for even greater performance benefit. ![]()
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