There are some features in C that are truncated in C++. To 
quote a few,

1. const int pi; // allowed in C.
   const int pi = 3.14; // equivalent in C++.

2. char name[10];
   for(int index = 0; index < 50; ++index)
   {
      scanf("%s", &name[index]); // sorry, I am weak in C.
   }

   This is allowed in C. That is, the array range checking 
is not done in C. In C++, it will throw an out of range 
error.

3. void function()
   {
     ....
   }

   int main()
   {
     function(299);
     return 0;
   }
  
   This is allowed in C but not in C++.