Function like macros

 #include <stdio.h>

#define ONE 1

#define AND &&

#define OR ||

#define TWO ONE + ONE

#define THREE TWO + ONE

#define MESSAGE "we can extend \

 the macro template by\

 using back slash"

int main()

{

    if (1 AND 1){printf("something true\n");}

    printf("%d\n", TWO);;

    printf("%d\n", THREE);

   printf( MESSAGE);

    

    return 0;

}

***********************************

#include <stdio.h>

#include <stdlib.h>

 #define SQUARE(X,Y) X*Y

int main()

{int result = SQUARE (10, 12);

printf("%d \n" , result);

    return 0;

}