#ifndef DEMO
#include <stdio.h>
#include <stdlib.h>
#endif
#define MAX 100
#define TWICE_AWFUL(x) x*2
#define TWICE_BAD(x) ((x)+(x))
#define TWICE_OK(x) ((x)*2)
#define NEW(type,count) (type*)malloc(sizeof(type)*(count))

typedef struct {
  int x,y;
} Point;

int main() {
 
  // What happens here?
  int y=3; 
  int z=4; 
  int w=TWICE_AWFUL(y+z);
#ifndef DEMO
  printf("w = %d\n", w);
#endif
 
  y=7; 
  z=TWICE_BAD(++y);
#ifndef DEMO
  printf("y = %d\n", y);
  printf("z = %d\n", z);
#endif
  z=TWICE_BAD(y++);
#ifndef DEMO
  printf("y = %d\n", y);
  printf("z = %d\n", z);
#endif

  if (y = 15) {
    char* c = NEW(char,MAX);
    Point* myPoint = NEW(Point,1);
#ifndef DEMO
    printf("y = %d\n", y);
#endif
  }

  return 0;
}