Preprocessor

     Find the output of the following c program.

     

   1.#include<stdio.h>

#define MAX 5;

int main()

{

 printf("%d",MAX);

 return 0;

}

   2.#include<stdio.h>

#define MSSG printf("Practice makes you different\n");

int main()

{ 

 MSSG

 return 0;

}

   3.#include<stdio.h>

#define PROD(x,y)  x*y

int main() 

{

int a;

a=PROD(2+3,3+2);

printf("Product=%d",a);

return 0;

}

   4.#include<stdio.h>

#define PROD(x,y)  ((x)*(y))

int main() 

{

int a=2+2, b=3;

printf("Product=%d",PROD(a,b));

return 0;

}

   5.#include<stdio.h>

#define A 5

#define B A+10

int main()

{

int i,j;

i=B/3;

j=15-B;

printf("i=%d,j=%d\n",i,j);

return 0;

}

   6.#include<stdio.h>

#define NEW_LINE printf("\n");

#define BLANK_LINES(n) {int i; for(i=0;i<n;i++) printf("\n");}

int main()

{

printf ("When you have a chance");

NEW_LINE

printf ("to motivate someone") ;

BLANK_LINES(2) 

printf("Give it a big hug");

NEW_LINE

return 0;

}

   7.#include<stdio.h>

#define INFINITE while(1)

#define CHECK(a) if(a==0) break

int main()

{

int x=5;

INFINITE

{

 printf ("%d ",x--) ;

 CHECK(x);

}

return 0;

}

   8.#include<stdio.h>

#define ABS(x) ((x)<0?(x):(x))

int main()

{

 int array[4]={1,-2,3,-4};

 int *p=array+3 ;

 while (p>=array)

 {

  printf("%d ",ABS(*p));       

  p--;

 }

 return 0;

}

   9.#include<stdio.h>

#define . ;

int main() 

{

printf("If the lift to success is broken, ").

printf("Try the stairs.").

return 0;

}

  10.#include<stdio.h>

#define CUBE(x) (x*x*x)

int main()

{

 printf("%d\n",CUBE(1+2));

 return 0;

}

  11.#include<stdio.h>

#define SQ(x) ((x)*(x))

int main()

{

int i=1;

while (i<=8)

printf("%d  ",SQ(i++));

return 0;

}

  12.#include<stdio.h>

#define SWAP(dtype,x,y) {dtype t; t=x+y, x=t-x, y=t-y;}

int main() 

{

 int a=1, b=2, x=3, y=4, s=5, t=6 ;

 SWAP(int,a,b)

 SWAP(int,x,y)

 SWAP(int,s,t)

 printf("a=%d,b=%d,x=%d,y=%d,s=%d,t=%d\n",a,b,x,y,s,t);

 return 0;

}

  13.#include<stdio.h>

#define INC(dtype,x,i) x=x+i

int main()

{

int arr[5]={2,3,5,1,9},*ptr=arr;     

INC(int,arr[2],3);

INC(int*,ptr,2);

printf("*ptr=%d\n",*ptr);

return 0;

}

  14.#include<stdio.h>

#define INT int

int main()

{

INT a=2, *p=&a;

printf("%d %d \n",a,*p);

return 0;

}

  15.#include<stdio.h>

#define Y 10

int main() 

{

#if X || Y && Z

printf ("Sea in Depth\n");

#else

printf("See in depth\n");

#endif

return 0;

}

  16.#include<stdio.h>

int main()

{

 int x=3,y=4,z;

 z=x+y;

 #include<string.h>

 printf("%d\n",z) ;

 return 0;

}

  17.#include<stdio.h>

#define MAX 3

int main( )

{

printf ("MAX=%d\n" ,MAX);            

#undef MAX

#ifdef MAX

printf("Have a good day");

#endif

return 0;

}

  18.#include<stdio.h>

#define PRINT(message) printf("faith") ;

int main()

{

 PRINT("Don't neglect love\n")

 return 0;

}

  19.#include<stdio.h>

#define PRINT(message) printf (#message);

int main()

{

 PRINT("If we rest, we rust.\n")

 return 0;

}

  20.#include<stdio.h>

#define show(value) printf(#value"=%d\n",value);

int main() 

{

int a=10,b=5,c=4;

show(a/b*c);

return 0;

}

  21.#include<stdio.h>

#define MACRO(a) if(a<=5) printf(#a"=%d\n”,a);

int main()

{

 int x=6,y=15;

 if (x<=y)

 MACRO(x);

 else

 MACRO(y);

 return 0;

}

  22.#include<stdio.h>

int main()

{

 #line 100 "pro.c"

 printf ("%d %s\n",__LINE__,__FILE__);

 return 0;

}

ANSWER

1.    compilation error

2.    Practice makes you different

3.    13

4.    12

5.    i=8,j=20

6.    When you have a chance

     to motivate someone

     Give it a big hug

7.    5 4 3 2 1

8.    -4 3 -2 1

9.    compilation error

10.  7

11.  2  12  30  56

12.  a=2,b=1,x=4,y=3,s=0,t=6

13.  *ptr=8

14.  2 2

15.  See in depth

16.  7

17.  MAX=3

18.  faith

19.  "If we rest, we rust.\n"

20.  a/b*c=8

21.  compilation error

22.  100 pro.c