Macro Definition and Expansion using #define in C Pre Processor
Source code for this Tutorial
#include <stdio.h> #include <stdlib.h> #define LIMIT 5 #define PI 3.1452 #define PASSWORD "32klj54op" #define DISPLAY printf("Hello world"); int main() { int counter; for(counter = 1; counter <= LIMIT; counter++) printf("%d\n",counter); printf("PI = %f\n",PI); printf("%s\n",PASSWORD); DISPLAY return 0; }