1 files changed, 30 insertions, 0 deletions
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..ed75659
--- /dev/null
+++ b/main.go
@@ -0,0 +1,30 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+func main() {
+	var err error
+	f := os.Stdin
+	if len(os.Args) > 1 {
+		f, err = os.Open(os.Args[1])
+		if err != nil {
+			panic(err)
+		}
+		defer f.Close()
+	}
+	sc := bufio.NewScanner(f)
+	for sc.Scan() {
+		s := sc.Bytes()
+		expr, err := Parse(s)
+		if err != nil {
+			fmt.Fprintln(os.Stderr, "Parse:", err)
+			continue
+		}
+		n := expr.Eval()
+		fmt.Println(n.String())
+	}
+}