On 2025-05-16 13:29:09 +0200, Charlie Gordon wrote:
> The correct portable way to print `int64_t` values is this:
> ```
> #include <stdio.h>
> #include <stdint.h>
> #include <inttypes.h>
>
> int main(int argc, char **argv) {
> int64_t a =123, b = 234;
> printf("%" PRId64 " %" PRId64 "\n", a, b);
> return 0;
> }
> ```
This is just *a* correct portable way...
> Microsoft compilers and libraries may be outdated and force you to
> use non portable alternatives.
> Tinycc uses the C library of the host system so if this library does
> not support the format that the macro PRId64 expands to, you may
> have to use long long types:
>
> ```
> #include <stdio.h>
>
> int main(int argc, char **argv) {
> long long a =123, b = 234;
> printf(“%lld %lld\n", a, b);
> return 0;
> }
> ```
The user may keep int64_t, but cast to long long just for the printf:
[...]
int64_t a =123, b = 234;
printf("%lld %lld\n", (long long) a, (long long) b);
[...]
This is portable because int64_t necessarily fits in a long long on
any platform.
--
Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)
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