When will you use uint_least16_t

Question

I look at stdint.h and given that it has uint16_t and uint_fast16_t, what do you need to use for uint_least16_t, what would you like, what could not be done equally well with one of the other two?

Answer 1

Suppose you are working on a compiler:

• unsigned char - 8 bits
• unsigned short - 32 bit
• unsigned int - 64 bit

And unsigned int is the "fastest". On this platform:

• uint16_t will not be available
• uint_least16_t will be a 32 bit value
• uint_fast16_t will have a 64-bit value

A bit secret, but why is it needed.

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Answer 2

Ah, , , : " typedef uint_leastN_t N, ".

, :

uint_least16_t , uint16

uint_fast16_t , uint16

uint16_t uint16, , , , uint_least16_t, . , , uint_least16_t.

Answer 3

This is part of the standard c. It does not need good use .: P

Take a look at this page and find the section titled "Minimum Values ​​for Integer Types."