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  • #13682

Closed
Open
Opened May 10, 2017 by Daishi Nakajima@nakaji-dayoReporter

When printf "%g" with trailing 0 number, decial point be printed.

C lang's printf function doesn't print decimal point if only trailing 0s. But GHC does.

Prelude Text.Printf> :m + Text.Printf
Prelude Text.Printf> printf "%g\n" 2.0
2.0
#include <stdio.h>

int main() {
  printf("%g\n", 2.0);
  return 0;
}
// output: 2

Is this bug? Should printf be compatible with C?

Trac metadata
Trac field Value
Version 8.0.1
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component libraries/base
Test case
Differential revisions
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Blocking
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Operating system
Architecture
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Reference: ghc/ghc#13682