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I've seen some code where they don't use primitive types int, float, double etc. directly. They usually typedef it and use it or use things like uint_8 etc.
Is it really necessary even these days? Or is C/C++ standardized enough that it is preferable to use int, float etc directly.
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The uint8 class is primarily meant to store integer values. Most operations that manipulate arrays without changing their elements are defined (examples are reshape , size , subscripted assignment and subscripted reference).
A UINT8 is an 8-bit unsigned integer (range: 0 through 255 decimal).
If the intended use of the variable is to hold an unsigned numerical value, use uint8_t; If the intended use of the variable is to hold a signed numerical value, use int8_t; If the intended use of the variable is to hold a printable character, use char.
A uint8 data type contains all whole numbers from 0 to 255. As with all unsigned numbers, the values must be non-negative. Uint8's are mostly used in graphics (colors are always non-negative).
Because the types like char, short, int, long, and so forth, are ambiguous: they depend on the underlying hardware. Back in the days when C was basically considered an assembler language for people in a hurry, this was okay. Now, in order to write programs that are portable -- which means "programs that mean the same thing on any machine" -- people have built special libraries of typedefs and #defines that allow them to make machine-independent definitions.
The secret code is really quite straight-forward. Here, you have uint_8, which is interpreted
u for unsigned
int to say it's treated as a number_8 for the size in bits.In other words, this is an unsigned integer with 8 bits (minimum) or what we used to call, in the mists of C history, an "unsigned char".
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