1 files changed, 25 insertions, 0 deletions
diff --git a/gsl-1.9/doc/examples/const.c b/gsl-1.9/doc/examples/const.c
new file mode 100644
index 0000000..47718c5
--- /dev/null
+++ b/gsl-1.9/doc/examples/const.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <gsl/gsl_const_mksa.h>
+
+int
+main (void)
+{
+  double c  = GSL_CONST_MKSA_SPEED_OF_LIGHT;
+  double au = GSL_CONST_MKSA_ASTRONOMICAL_UNIT;
+  double minutes = GSL_CONST_MKSA_MINUTE;
+
+  /* distance stored in meters */
+  double r_earth = 1.00 * au;  
+  double r_mars  = 1.52 * au;
+
+  double t_min, t_max;
+
+  t_min = (r_mars - r_earth) / c;
+  t_max = (r_mars + r_earth) / c;
+
+  printf ("light travel time from Earth to Mars:\n");
+  printf ("minimum = %.1f minutes\n", t_min / minutes);
+  printf ("maximum = %.1f minutes\n", t_max / minutes);
+
+  return 0;
+}