Use macro features of C language

9 10 11 12 13 14 15 16 17 18

#include<stdio.h> #include<conio.h> #define pf printf #define sf scanf #define vm void main() #define cls clrscr #define gt getch #define val 100 void main() {   int n;   cls();   printf("Enter a number : ");   scanf("%d",&n);   printf("Given Number  = "%d",n);   p("\nval = %d",val);   getch(); }