1 files changed, 19 insertions, 0 deletions
diff --git a/c/space-age/src/space_age.h b/c/space-age/src/space_age.h
new file mode 100644
index 0000000..5c96478
--- /dev/null
+++ b/c/space-age/src/space_age.h
@@ -0,0 +1,19 @@
+#ifndef SPACE_AGE_H
+#define SPACE_AGE_H
+
+#include <stdint.h>
+
+typedef enum {
+   MERCURY,
+   VENUS,
+   EARTH,
+   MARS,
+   JUPITER,
+   SATURN,
+   URANUS,
+   NEPTUNE,
+} planet_t;
+
+float age(planet_t planet, int64_t seconds);
+
+#endif