printf g format specifier doesn't match the C standard behaviour
[nix-shell:/tmp]$ clang printg.c && ./a.out && cat printg.c
3122.55
#include <stdio.h>
int main(void) {
printf("%.16g\n", 3122.55);
}
[nix-shell:/tmp]$ runhaskell printg.hs && cat printg.hs
3122.5500000000000000
import Text.Printf (printf)
main = printf "%.16g\n" (3122.55 :: Double)
Some more info here https://stackoverflow.com/questions/54162152/what-precisely-does-the-g-printf-specifier-mean
Notably I'd expect GHC to give me the same answer as the shown C program.
Trac metadata
Trac field | Value |
---|---|
Version | 8.6.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Core Libraries |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |