Clean up logic

With only this file having comments, it seems right to normalize it here.

c/c++.cpp

@@ -1,9 +1,9 @@
-#include <iostream> // include API
+#include <iostream>
 
 using namespace std;
 
-int main() // the main code portion of a C++ program
+int main()
 {
-   cout << "Hello World" << endl;  //print Hello World on the screen 
+   cout << "Hello World" << endl;
-   return 0; // conventional
+   return 0;
 }