WAP to Multiple line in macros expansion

/*WAP to Multiple line in macros expansion*/
/* Program to draw horizontal & vertical line */

#include<stdio.h>
#include<conio.h>
#define HLINE   for ( i = 0 ; i < 79 ; i++ ) \  
                             printf ( "%c", 196 ) ;

#define VLINE( X, Y )  {\gotoxy ( X, Y ) ; \
       printf ( "%c", 179 ) ; \
     }
main( )
{
 int  i, y ;
 clrscr( ) ;

 gotoxy ( 1, 12 ) ;
 HLINE

 for ( y = 1 ; y < 25 ; y++ )
  VLINE ( 39, y ) ;
 getch();
}

WAP to Macros expansion with arguments

/*WAP to Macros expansion with arguments */
/* Program to test whether entered character is digit */

#define ISDIGIT(y) ( y >= 48 && y <= 57 )
main( )
{
 char  ch ;

 printf ( "Enter any digit " ) ;
 scanf ( "%c", &ch ) ;

 if ( ISDIGIT ( ch ) )
  printf ( "\nYou entered a digit" ) ;
 else
  printf ( "\nIllegal input" ) ;
       getch();
} 

WAP to use Macros expansion with arguments

/*WAP to use Macros expansion with arguments */

#include<stdio.h>
#include<conio.h>
#define AREA(x) ( 3.14 * x * x )
main( )
{
 float  r1 = 6.25, r2 = 2.5, a ;
 
 a = AREA ( r1 ) ;
 printf ( "\nArea of circle = %f", a ) ;
 a = AREA ( r2 ) ;
 printf ( "\nArea of circle = %f", a ) ;
       getch();
}

WAP to # define statement used to replace entire C statement

/*WAP to # define statement used to replace entire C statement */

#include<stdio.h>

#define FOUND printf ( "The Yankee Doodle Virus" ) ;
main( )
{
 char  signature ;

 if ( signature == 'Y' ) 
  FOUND
 else
  printf ( "Safe... as yet !" ) ;
 getch();
}

WAP to Nested macro expansion

/*WAP to Nested macro expansion*/

#include<stdio.h>
#include<conio.h>
#define AND &&
#define ARANGE ( a > 25 AND a < 50 )
main( )
{
 int  a = 30 ;

 if ( ARANGE )
  printf ( "within range" ) ;
 else
  printf ( "out of range" ) ;
 getch();
}

WAP to use Macro expansion Logical operator

/*WAP to use Macro expansion Logical operator*/

#include<stdio.h>
#include<conio.h>
#define AND &&
#define OR  ||
main( )
{
 int  f = 1, x = 4, y = 90 ;

 if ( ( f < 5 ) AND ( x <= 20 OR y <= 45 ) )
  printf ( "\nYour PC will always work fine..." ) ;
 else
  printf ( "\nIn front of the maintenance man" ) ;
 getch();
}

WAP to Use of macro expansion2

/*WAP to Use of macro expansion*/

#include<stdio.h>
#include<conio.h>
#define PI  3.1415
main( )
{
 float  r = 6.25 ;
 float  area ;

 area = PI * r * r ;
 printf ( "\nArea of circle = %f", area ) ;
 getch();
}

WAP to Use of macro expansion

/*WAP to Use of macro expansion*/

#include<stdio.h>
#include<conio.h>
#define UPPER 25
main( )
{
 int  i ;
 for ( i = 1 ; i <= UPPER ; i++ )
  printf ( "\n%d", i ) ;
}