GitHub Action to lint C and C++ code (#156)

* GitHub Action to lint C and C++ code

GitHub Action to run cpplint recursively on all pushes and pull requests https://github.com/cpplint/GitHub-Action-for-cpplint

* Update cpplint.yml

* Update cpplint.yml

* Update cpplint.yml

* Fix import order

Found C system header after C++ system header. Should be: doubly.h, c system, c++ system, other.  [build/include_order] [4]

* Fix import order

* Update string-tokeniser.cpp

.github/workflows/cpplint.yml

@@ -0,0 +1,13 @@
+# GitHub Action to run cpplint recursively on all pushes and pull requests
+# https://github.com/cpplint/GitHub-Action-for-cpplint
+
+name: cpplint
+on: [push, pull_request]
+jobs:
+  cpplint:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-python@v2
+    - run: pip install cpplint
+    - run: cpplint --counting=detailed --filter=-build/namespaces,-legal,-readability,-runtime,-whitespace --recursive .

linked-lists/c-or-cpp/doubly.cpp

@@ -1,36 +1,36 @@
+#include <bits/stdc++.h>
 #include <iostream>
-#include<bits/stdc++.h>
 using namespace std;
 struct Node {
-   int data;
+   int data;
-   struct Node *prev;
+   struct Node *prev;
-   struct Node *next;
+   struct Node *next;
 };
 struct Node* head = NULL;
 void insert(int newdata) {
-   struct Node* newnode = (struct Node*) malloc(sizeof(struct Node));
+   struct Node* newnode = (struct Node*) malloc(sizeof(struct Node));
-   newnode->data = newdata;
+   newnode->data = newdata;
-   newnode->prev = NULL;
+   newnode->prev = NULL;
-   newnode->next = head;
+   newnode->next = head;
-   if(head != NULL)
+   if(head != NULL)
-   head->prev = newnode ;
+   head->prev = newnode ;
-   head = newnode;
+   head = newnode;
 }
 void display() {
-   struct Node* ptr;
+   struct Node* ptr;
-   ptr = head;
+   ptr = head;
-   while(ptr != NULL) {
+   while(ptr != NULL) {
-      cout<< ptr->data <<" ";
+      cout<< ptr->data <<" ";
-      ptr = ptr->next;
+      ptr = ptr->next;
-   }
+   }
 }
 int main() {
-   insert(3);
+   insert(3);
-   insert(1);
+   insert(1);
-   insert(7);
+   insert(7);
-   insert(2);
+   insert(2);
-   insert(9);
+   insert(9);
-   cout<<"The doubly linked list is: ";
+   cout<<"The doubly linked list is: ";
-   display();
+   display();
-   return 0;
+   return 0;
 }

multiplication/c-or-cpp/karatsuba.cpp

@@ -1,6 +1,6 @@
+#include <math.h>
 #include <iostream>
 #include <string>
-#include <math.h>
 using namespace std;
 
 int equalize_strings(string &x, string &y) {

strings/c-or-cpp/string-tokeniser.cpp

@@ -1,6 +1,6 @@
 #include <iostream>
 #include <string>
-#include <chrono>
+#include <chrono>  // NOLINT [build/c++11]
 
 using namespace std;