support bazel complie this project and format code.

basic_content/const/funciton_const/condition1/BUILD

@@ -0,0 +1,24 @@
+# please run `bazel run basic_content/const/funciton_const/condition2:condition1`
+# please run `bazel run basic_content/const/funciton_const/condition2:condition2`
+# please run `bazel run basic_content/const/funciton_const/condition2:condition3`
+load("@rules_cc//cc:defs.bzl", "cc_binary")
+
+# Don't panic if you get compilation errors, this is what this code demonstrates, as expected.
+cc_binary(
+    name = "condition1",
+    srcs = ["condition1.cpp"],
+    copts = ["-std=c++11"]
+)
+
+# Don't panic if you get compilation errors, this is what this code demonstrates, as expected.
+cc_binary(
+    name = "condition2",
+    srcs = ["condition2.cpp"],
+    copts = ["-std=c++11"]
+)
+
+cc_binary(
+    name = "condition3",
+    srcs = ["condition3.cpp"],
+    copts = ["-std=c++11"]
+)

basic_content/const/funciton_const/condition1/condition1.cpp

@@ -1,8 +1,7 @@
-#include<iostream>
+#include <iostream>
 using namespace std;
 
-
-int main(){
-    const int *ptr;
-    *ptr=10; //error
+int main() {
+  const int *ptr;
+  *ptr = 10; // error
 }

basic_content/const/funciton_const/condition1/condition2.cpp

@@ -1,9 +1,8 @@
-#include<iostream>
+#include <iostream>
 using namespace std;
 
-
-int main(){
-    const int p = 10;
-    const void *vp = &p;
-    void *vp = &p; //error
+int main() {
+  const int p = 10;
+  const void *vp = &p;
+  void *vp = &p; // error
 }

basic_content/const/funciton_const/condition1/condition3.cpp

@@ -1,12 +1,11 @@
-#include<iostream>
+#include <iostream>
 using namespace std;
 
-int main(){
-    const int *ptr;
-    int val = 3;
-    ptr = &val; //ok
-    int *ptr1 = &val;
-    *ptr1=4;
-    cout<<*ptr<<endl;
-
+int main() {
+  const int *ptr;
+  int val = 3;
+  ptr = &val; // ok
+  int *ptr1 = &val;
+  *ptr1 = 4;
+  cout << *ptr << endl;
 }

basic_content/const/funciton_const/condition2/BUILD

@@ -0,0 +1,23 @@
+# please run `bazel run basic_content/const/funciton_const/condition2:condition1`
+# please run `bazel run basic_content/const/funciton_const/condition2:condition2`
+# please run `bazel run basic_content/const/funciton_const/condition2:condition3`
+load("@rules_cc//cc:defs.bzl", "cc_binary")
+
+cc_binary(
+    name = "condition1",
+    srcs = ["condition1.cpp"],
+    copts = ["-std=c++11"]
+)
+
+# Don't panic if you get compilation errors, this is what this code demonstrates, as expected.
+cc_binary(
+    name = "condition2",
+    srcs = ["condition2.cpp"],
+    copts = ["-std=c++11"]
+)
+
+cc_binary(
+    name = "condition3",
+    srcs = ["condition3.cpp"],
+    copts = ["-std=c++11"]
+)

basic_content/const/funciton_const/condition2/condition1.cpp

@@ -1,10 +1,9 @@
-#include<iostream>
+#include <iostream>
 using namespace std;
-int main(){
-
-    int num=0;
-    int * const ptr=&num; //const指针必须初始化！且const指针的值不能修改
-    int * t = &num;
-    *t = 1;
-    cout<<*ptr<<endl;
+int main() {
+  int num = 0;
+  int *const ptr = &num; // const指针必须初始化！且const指针的值不能修改
+  int *t = &num;
+  *t = 1;
+  cout << *ptr << endl;
 }

basic_content/const/funciton_const/condition2/condition2.cpp

@@ -1,8 +1,7 @@
-#include<iostream>
+#include <iostream>
 using namespace std;
-int main(){
-
-    const int num=0;
-    int * const ptr=&num; //error! const int* -> int*
-    cout<<*ptr<<endl;
+int main() {
+  const int num = 0;
+  int *const ptr = &num; // error! const int* -> int*
+  cout << *ptr << endl;
 }

basic_content/const/funciton_const/condition2/condition3.cpp

@@ -1,8 +1,7 @@
-#include<iostream>
+#include <iostream>
 using namespace std;
-int main(){
-
-    const int num=10;
-    const int * const ptr=&num; //error! const int* -> int*
-    cout<<*ptr<<endl;
+int main() {
+  const int num = 10;
+  const int *const ptr = &num; // error! const int* -> int*
+  cout << *ptr << endl;
 }

basic_content/const/funciton_const/condition3/BUILD

@@ -0,0 +1,9 @@
+# please run `bazel run basic_content/const/funciton_const/condition3:condition1`
+load("@rules_cc//cc:defs.bzl", "cc_binary")
+
+# Don't panic if you get compilation errors, this is what this code demonstrates, as expected.
+cc_binary(
+    name = "condition1",
+    srcs = ["condition1.cpp"],
+    copts = ["-std=c++11"]
+)

basic_content/const/funciton_const/condition3/condition1.cpp

@@ -1,10 +1,8 @@
-#include<iostream>
+#include <iostream>
 using namespace std;
 
-int main(){
-
-    const int p = 3;
-    const int * const ptr = &p;
-    cout<<*ptr<<endl;
-
+int main() {
+  const int p = 3;
+  const int *const ptr = &p;
+  cout << *ptr << endl;
 }