1 files changed, 36 insertions, 0 deletions
diff --git a/2024/tcl/03.tcl b/2024/tcl/03.tcl
new file mode 100755
index 0000000..d1ff7c9
--- /dev/null
+++ b/2024/tcl/03.tcl
@@ -0,0 +1,36 @@
+#!/bin/env tclsh
+
+source lib.tcl
+setup 3
+
+puts {Part 1: Sum of mul(x,y) calls...}
+
+set mulsum 0
+set mulsum_cf 0
+set cf 1
+foreach {inst a b} [regexp -all -inline {do\(\)|don't\(\)|mul\((\d+),(\d+)\)} [read $input]] {
+  switch -- [string range $inst 0 2] {
+    mul {
+      set inc [expr {$a * $b}]
+      incr mulsum $inc
+      if $cf {
+        incr mulsum_cf $inc
+      }
+    }
+    do( {
+      set cf 1
+    }
+    don {
+      set cf 0
+    }
+  }
+}
+
+close $input
+
+puts "Sum: $mulsum"
+
+puts ""
+puts {Part 2: ...with control flow.}
+
+puts "Sum: $mulsum_cf"