feat: add bubbleSort in c++(#551)

Co-authored-by: willrlzhang <willrlzhang@tencent.com>

Author: daliang111

basic/sorting/BubbleSort/README.md

@@ -93,7 +93,78 @@ func main() {
 }
 ```
 
-<!-- tabs:end -->
+### **C++**
+```c++
+#include <iostream>
+#include <vector>
+#include <string>
+
+using namespace std;
+
+/* 简单版本 */
+void bubblesort( vector<int> & vec )
+{
+    for ( int i = 0; i < vec.size() - 1; i++ )
+    {
+        for ( int j = 0; j < vec.size() - i - 1; j++ )
+        {
+            if ( vec[j] > vec[j + 1] )
+            {
+                swap( vec[j], vec[j + 1] );
+            }
+        }
+    }
+}
+
+
+/* 改进版本 */
+void bubblesort1( vector<int> & vec )
+{
+    for ( int i = 0; i < vec.size() - 1; i++ )
+    {
+        bool exchange = false;
+        for ( int j = 0; j < vec.size() - i - 1; j++ )
+        {
+            if ( vec[j] > vec[j + 1] )
+            {
+                swap( vec[j], vec[j + 1] );
+                exchange = true;
+            }
+        }
+
+        if ( !exchange )
+        {
+            break;
+        }
+    }
+}
+
+
+void printvec( const vector<int> & vec, const string & strbegin = "", const string & strend = "" )
+{
+    cout << strbegin << endl;
+    for ( auto val : vec )
+    {
+        cout << val << "\t";
+    }
+
+    cout << endl;
+    cout << strend << endl;
+}
+
+
+int main( void )
+{
+    vector<int> vec = { 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };
+    printvec( vec );
+
+    bubblesort1( vec );
+
+    printvec( vec, "after sort", "" );
+}
+
+
+```
 
 ## 算法分析
 

basic/sorting/BubbleSort/bubblesort.cpp

@@ -0,0 +1,69 @@
+#include <iostream>
+#include <vector>
+#include <string>
+
+using namespace std;
+
+/* 简单版本 */
+void bubblesort( vector<int> & vec )
+{
+    for ( int i = 0; i < vec.size() - 1; i++ )
+    {
+        for ( int j = 0; j < vec.size() - i - 1; j++ )
+        {
+            if ( vec[j] > vec[j + 1] )
+            {
+                swap( vec[j], vec[j + 1] );
+            }
+        }
+    }
+}
+
+
+/* 改进版本 */
+void bubblesort1( vector<int> & vec )
+{
+    for ( int i = 0; i < vec.size() - 1; i++ )
+    {
+        bool exchange = false;
+        for ( int j = 0; j < vec.size() - i - 1; j++ )
+        {
+            if ( vec[j] > vec[j + 1] )
+            {
+                swap( vec[j], vec[j + 1] );
+                exchange = true;
+            }
+        }
+
+        if ( !exchange )
+        {
+            break;
+        }
+    }
+}
+
+
+void printvec( const vector<int> & vec, const string & strbegin = "", const string & strend = "" )
+{
+    cout << strbegin << endl;
+    for ( auto val : vec )
+    {
+        cout << val << "\t";
+    }
+
+    cout << endl;
+    cout << strend << endl;
+}
+
+
+int main( void )
+{
+    vector<int> vec = { 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };
+    printvec( vec );
+
+    bubblesort1( vec );
+
+    printvec( vec, "after sort", "" );
+}
+
+