File: TestModF.c

package info (click to toggle)
swi-prolog 9.0.4%2Bdfsg-2
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 82,408 kB
  • sloc: ansic: 387,503; perl: 359,326; cpp: 6,613; lisp: 6,247; java: 5,540; sh: 3,147; javascript: 2,668; python: 1,900; ruby: 1,594; yacc: 845; makefile: 428; xml: 317; sed: 12; sql: 6
file content (15 lines) | stat: -rw-r--r-- 263 bytes parent folder | download | duplicates (2) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
 
#include <math.h>

double d = -0.0;
double i;

int
main(int argc, char **argv)
{ 
  /* IEEE754: check if the fractional part of -0.0 is negative */
  if ( copysign(1.0, modf(d, &i)) == -1.0 )
    return 0;

  /* positive (violating the standard) */
  return 1;
}