// What is used by a function call?

#include "mem_syms.h"
#define ADDR DEC

unsigned int gcd(unsigned int a, unsigned int b) {
  unsigned int result;
  
  Serial.print("Stack size: ");
  Serial.println( (int) STACK_SIZE, ADDR);

  if ( a == 0 ) { 
    result = b;
  }
  else if ( a == 1 ) { 
    result = 1;
  }
  else {
    result = gcd(b, a % b);
  }
  
  // comment out the next two lines and observe the change in stack size
  Serial.print(a, DEC);  Serial.print(" ");  
  Serial.print(b, DEC);  Serial.println(" ");
  return result;
}
  

void setup() {
  unsigned int g;
  Serial.begin(9600);
    
  Serial.println("MEM07");
  
  Serial.print("Avail mem:");  Serial.println(AVAIL_MEM, DEC);

  g = gcd(8820, 462);  
  Serial.print("gcd is ");
  Serial.println(g, DEC);  
 }

void loop() {
}