#include <stdio.h>

// This was our basic example
#define SUM(x,y) ( (x) + (y) )

// Let us define a SQR macro.
// Remember what happened when we forgot the brackets!!!
#define SQR(x)  ( (x) * (x) )
#define SQR_BAD(x)  ( x * x )

// Function equivalent to above macro:
int sqr(int a) {
  return a*a;
}

// Very useful macro!
#define PRINT(message) printf("%s:%d %s\n",__FILE__,__LINE__,message);


int main() {

  int a = 3;
  int b = 4;
  int sum = SUM(a,b);

  PRINT("got here");
  
  int square = SQR(a);

  printf("a: %d, b: %d, SUM: %d\n",a,b,sum);
  printf("a: %d, SQR: %d\n",a,square);

  int square2 = SQR(a+2);
  int square2bad = SQR_BAD(a+2);
  printf("a+2: %d, SQR: %d SQR_BAD: %d\n",a+2,square2,square2bad);  

  PRINT("still got here");

  int square3 = SQR(a++);
  printf("a: %d, SQR: %d\n",a,square3);  

  int square4 = SQR(++a);
  printf("a: %d, SQR: %d\n",a,square4);  

  return 0;
}