Initial data commit

Task/Caesar-cipher/Fhidwfe/caesar-cipher.fhidwfe

@@ -0,0 +1,42 @@
+lowers = ['a','z']
+uppers = ['A','Z']
+function void caesar_encode(message:ptr key:uint) {
+  len = strlen$ message
+  for uint [0u,len) with index {
+    temp = deref_ubyte$ + message index
+    if in temp lowers {
+      temp = + temp key// shift lowercase letters
+      if > temp 'z' {
+        temp = - temp 26ub
+      } ;		
+    } {
+      if in temp uppers {
+        temp = + temp key// shift uppercase letters
+        if > temp 'Z' {
+          temp = - temp 26ub
+        } ;
+      } ;//don't shift other characters
+    }
+    put_ubyte$ + message index temp
+  }
+}
+function void caesar_decode(message:ptr key:uint) {
+  caesar_encode$ message - 26u key
+}
+
+key = 1u
+response = malloc$ 256u
+puts$ "plaintext: "
+getline$ response
+caesar_encode$ response key
+puts$ "cyphertext: "
+puts$ response
+putln$
+caesar_decode$ response key
+puts$ "decoded: "
+puts$ response
+free$ response
+free$ lowers // ranges are objects and must be freed
+free$ uppers
+
+//this compiles with only 6 warnings!