Question

How to use unsigned fixed-width integer type in C

Answer 1

#include <stdio.h>
#include <inttypes.h>

int main(void)
{
    uint8_t ui8 = 255;
    uint16_t ui16 = 16000;
    uint32_t ui32 = 320000;
    uint64_t ui64 = 6400000;
    
    printf("%d\n", ui8);
    printf("%d\n", ui16);
    printf("%" PRId32 "\n", ui32);
    printf("%" PRId64 "\n", ui64);
}




/*
run:

255
16000
320000
6400000

*/

 

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Answer 2

#include <stdio.h>
#include <inttypes.h>

int main(void)
{
    uint_fast8_t ui8 = 255;
    uint_fast16_t ui16 = 16000;
    uint_fast32_t ui32 = 320000;
    uint_fast64_t ui64 = 6400000;
    
    printf("%d\n", ui8);
    printf("%ld\n", ui16);
    printf("%ld\n", ui32);
    printf("%" PRId64 "\n", ui64);
}




/*
run:

255
16000
320000
6400000

*/

 

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