Merge branch 'krahets:master' into patch-1

docs/chapter_sorting/insertion_sort.md

@@ -135,7 +135,24 @@ comments: true
 === "C"
 
     ```c title="insertion_sort.c"
-
+    /* 插入排序 */
+    void insertionSort(int nums[], int size)
+    {
+        // 外循环：base = nums[1], nums[2], ..., nums[n-1]
+        for (int i = 1; i < size; i++)
+        {
+            int base = nums[i], j = i - 1;
+            // 内循环：将 base 插入到左边的正确位置
+            while (j >= 0 && nums[j] > base)
+            {
+                // 1. 将 nums[j] 向右移动一位
+                nums[j + 1] = nums[j]; 
+                j--;
+            }
+            // 2. 将 base 赋值到正确位置
+            nums[j + 1] = base; 
+        }
+    }
     ```
 
 === "C#"