diff --git a/src/composables/helper.ts b/src/composables/helper.ts
index 9691ca6..da62137 100644
--- a/src/composables/helper.ts
+++ b/src/composables/helper.ts
@@ -5,7 +5,8 @@ export const insertText = ref("")
 export const cTexts = [
   ",",
   ";",
-  "printf();",
+  'printf("");',
+  'scanf("");',
   "{\n}",
   "int",
   "%d",
diff --git a/src/mobile/Content.vue b/src/mobile/Content.vue
index e040326..81b6a2f 100644
--- a/src/mobile/Content.vue
+++ b/src/mobile/Content.vue
@@ -48,6 +48,8 @@ whenever(insertText, (text: string) => {
   if (text === "{}") delta = 1
   // range():
   if (text.slice(len - 2) === "):") delta = 2
+  // printf(""); scanf("");
+  if (text.slice(len - 3) === '");') delta = 3
   if (delta > 0) {
     const pos = codeEditor.state.selection.main.head - delta
     codeEditor.dispatch({