support bazel complie this project and format code.

cpp2.0/cpp11/tuple.cpp

@@ -0,0 +1,27 @@
+//
+// Created by light on 19-11-4.
+//
+
+#include <iostream>
+#include <tuple>
+
+using namespace std;
+
+// tuple使用
+int main() {
+    tuple<int, int, string> t, t1, t2;
+    t = make_tuple(1, 2, "qwe");
+    t1 = make_tuple(3, 2, "qwe");
+    t2 = make_tuple(3, 2, "qwe");
+    int a = get<0>(t);
+    get<0>(t) = get<1>(t);   // 可以修改
+    cout << a << endl;
+    cout << (get<0>(t) > get<1>(t) ? "true" : "false") << endl; // 比较大小
+    cout << (t1 == t2 ? "true" : "false") << endl;
+    typedef tuple<int, int, int, string> T;
+    cout << tuple_size<T>::value << endl;   // meta programming 处理类型
+    cout << tuple_size<T>::value << endl;
+    tuple_element<1, T>::type a1 = 10;
+    cout << a1 << endl;
+    return 0;
+}