diff --git a/README.md b/README.md
index 479aa35..3e7d5e3 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,6 @@ This seems intended by the creators of the language.
 - count number of headings for each heading level
 (loop through all headings, find the highest heading level, get all used levels\
 then create a slice or slice of maps and append after each deeper level discovered...)
-- add docs
+- print heading tree
 - delph deeper into different Markdown implementations (like CommonMark)
 - add support for "Setext-style headers"
diff --git a/main.go b/main.go
index 62edd39..152a459 100644
--- a/main.go
+++ b/main.go
@@ -13,6 +13,12 @@ import (
 	"strings"
 )
 
+type heading struct {
+	text  string
+	level int
+	line  int
+}
+
 func is_heading(line string) bool {
 	if strings.HasPrefix(line, "#") {
 		return true
@@ -21,20 +27,22 @@ func is_heading(line string) bool {
 	}
 }
 
-func get_heading_level(heading string) int {
+func get_heading_level(heading_text string) int {
 	level := 0
-	for i := 0; heading[i] == '#'; i++ {
+	for i := 0; heading_text[i] == '#'; i++ {
 		level += 1
 	}
 	return level
 }
 
-func print_toc(headings []string) {
+func print_toc(headings []heading) {
 	tab_count := 0
-	for index, value := range headings {
+	for index, _ := range headings {
 		if index > 0 {
-			prev_level := get_heading_level(headings[index-1])
-			cur_level := get_heading_level(headings[index])
+			prev_level := get_heading_level(headings[index-1].text)
+			cur_level := get_heading_level(headings[index].text)
+
+			headings[index].level = cur_level
 
 			if cur_level > prev_level {
 				tab_count += (cur_level - prev_level)
@@ -45,14 +53,14 @@ func print_toc(headings []string) {
 				fmt.Printf("\t")
 			}
 		}
-		fmt.Printf("%s\n", value)
+		fmt.Printf("%v\n", headings[index])
 	}
 }
 
 func main() {
 	file_content_raw, err := os.ReadFile(os.Args[1])
 
-	var headings []string = nil
+	var headings []heading = nil
 
 	if err != nil {
 		log.Fatal(err)
@@ -62,9 +70,9 @@ func main() {
 
 	file_lines := strings.Split(file_content, "\n")
 
-	for _, value := range file_lines {
+	for index, value := range file_lines {
 		if is_heading(value) {
-			headings = append(headings, value)
+			headings = append(headings, heading{value, 0, (index + 1)})
 		}
 	}