cs Sept 23, 2014

Ch 8 : C++ overview
Ch 5 : exce topms
By now you should have read ch3 to ch 8
except 6 and 7

scope : limit to be as local as possible so identifiers can be reused and maintained more asily, debug more easily.

#include <iostream>
class A
{
 public :
     int c; // class scope
};

int x ; // global scope file
int main ()
{
   int y; // local scope
  A a1;

   for (int i =0; i <N ; i++)
      cout << i;  // statement scope

   std::cout << a1.c;  (first is namespace scope and teh second is clas scope
}
int f(int a) // local scope (function) (block)
{
   int b;
}
default x, 0 as it is a global variable but not y as it is a local variable.
What is the default initialization of objects of type A. use default constructor
Pg 266
Pg 260

while (double d; cin >> d)

Interface : declaration
.h
-- main application will use these by including thing include . h files
Implementation : definition
.cpp will also include the .h files to implement the interface.


vector<string> v; //initialized to empty

cannot do initialization in the class, definiing a type when we do the following

class A
{
   public :
         int c; / can't initialize
}

only in the default constructor.