Constants
Pascal         C/C++
const
   size = 100;
   pi = 3.14159;
   first = ‘A’;
   filename = ‘A.DAT’;
#define size 100
#define pi 3.14159
#define first ‘A’
#define filename “A.DAT”
ANSI C and C++ only
const int size=100;
const float pi=3.14159;
const char first = ‘A’;
const char
filename[]=“A.DAT”;