View Code of Problem 73

#include<stdio.h>
int main()
{
  int day,x1,x2;
  day=N-1;
  x2=1;
  while(day>0)
  {
    x1=2*(x2+1);
  }
  printf("%d",x1);
  return 0;
}
  
/*
Main.c: In function 'main':
Main.c:5:7: error: 'N' undeclared (first use in this function)
   day=N-1;
       ^
Main.c:5:7: note: each undeclared identifier is reported only once for each function it appears in
*/