What we've missed out

dynamic allocation and deallocation of memory

malloc and free: used for allocating (and freeing up) memory for objects the size of which are not known at compile time --- dangerous! (No garbage-collector, possibility of memory leaks, crashes...

explicit type casts

/* Prototypes : */ double sqrt (double x); int n = 2; double root_2 = sqrt ((double) n);

enumerated types

enum DAYS = {SUN = 1, MON, TUE, WED, THUR, FRI, SAT} /* MON = 2, TUE = 3, ... */

unions

a variable that may hold (at different times) objects of different types and sizes

ANSI standard libraries

<assert.h> <float.h> <math.h> <stdarg.h> <stdlib.h> <ctype.h> <limits.h> <setjmp.h> <stddef.h> <string.h> <errno.h> <locale.h> <signal.h> <stdio.h> <time.h>

The Pre-Processor

#include #define #if #ifdef #ifndef #elif #else #endif