The most common alternative to #pragma once is to use #define to set an include guard macro, the name of which is picked by the programmer to be unique to that file. For example, #ifndef GRANDPARENT_H #define GRANDPARENT_H ... contents of grandparent.h #endif /* !GRANDPARENT_H */.
1 Costco is three years old and has 17 locations, 1.3 million members, and 3,740 employees.  Costco's first Pharmacy opens in Portland, Oregon and the Tukwila, WA warehouse becomes the house of the company's first fresh meat department.
Kroger's total food store sales area from 2009 to 2015 (in million square feet)Kroger's total food store sales area 2009-2015. Net sales of Costco worldwide from 2010 to 2016 (in million U.S. dollars)Costco's net sales worldwide 2010-2016. Number of Costco warehouses worldwide from 2010 to 2016Costco's number of warehouses worldwide 2010-2016.