Support the o, f and p options, patch by Magnus M�rtensson

1 files changed, 6 insertions, 1 deletions

diff --git a/include/usage.h b/include/usage.h
index 5b357a218..2ebf9ad43 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -245,7 +245,12 @@
 #define dc_full_usage \
         "This is a Tiny RPN calculator that understands the\n" \
         "following operations: +, -, /, *, and, or, not, eor.\n" \
-        "i.e., 'dc 2 2 add' -> 4, and 'dc 8 8 \\* 2 2 + /' -> 16"
+        "i.e., 'dc 2 2 add' -> 4, and 'dc 8 8 \\* 2 2 + /' -> 16" \
+        "p - Prints the value on the top of the stack, without altering the stack.\n" \
+        "f - Prints the entire contents of the stack without altering anything.\n" \
+        "o - Pops the value off the top of the stack and uses it to set the output radix.\n" \
+        "    Only 10 and 16 are supported.\n"
+
 #define dc_example_usage \
         "$ dc 2 2 +\n" \
         "4\n" \