src/regression/printf-fmt-g-zeros.c

   1 // commit 89740868c9f1c84b8ee528468d12df1fa72cd392 2014-04-07
   2 // %g should not print trailing zeros
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include "test.h"
   6
   7 static void t(const char *fmt, double d, const char *want)
   8 {
   9         char buf[256];
  10         int n = strlen(want);
  11         int r = snprintf(buf, sizeof buf, fmt, d);
  12         if (r != n || memcmp(buf, want, n+1) != 0)
  13                 t_error("snprintf(\"%s\",%f) want %s got %s\n", fmt, d, want, buf);
  14 }
  15
  16 int main()
  17 {
  18         t("%.50g", 100000000000000.5, "100000000000000.5");
  19         t("%.50g", 987654321098765.0, "987654321098765");
  20         return t_status;
  21 }