choonewza

void setup() {
  Serial.begin(115200);
  while(!Serial);
  
  Serial.println("Size of Variable");
  Serial.println();
  Serial.println(String("char = ") + sizeof(char) + " Byte");
  Serial.println(String("boolean = ") + sizeof(bool) + " Byte");
  Serial.println(String("short int = ") + sizeof(short int) + " Byte");
  Serial.println(String("long int = ") + sizeof(long int) + " Byte");

choonewza

#include <MemoryFree.h> //https://github.com/mpflaga/Arduino-MemoryFree

void setup() {
  Serial.begin(115200);
  while(!Serial);
}

void loop() {
  String *msg = new String("55555");
  showFreeMemory();

choonewza

#include "Screen.h"

Screen::~Screen()
{
  delete this->screen;
}