support bazel complie this project and format code.

learn_class/modern_cpp_30/SFINAE/sfinae paper/overload1.cpp

@@ -0,0 +1,14 @@
+//
+// Created by light on 20-1-6.
+//
+#include <iostream>
+
+void f(std::string s); // int can't be convert into a string.
+void f(double d); // int can be implicitly convert into a double, so this version could be selected, but...
+void f(int i); // ... this version using the type int directly is even more close!
+
+
+
+int main() {
+    f(1); // Call f(int i);
+}