// Program: limits-E.ino
/*
  Determine the memory sizes and limits of datatypes

  Ref: https://www.tutorialspoint.com/c_standard_library/limits_h.htm
*/

#include <limits.h>

void setup()
{
  // Initialize serial and wait for port to open
  Serial.begin(115200);
}

void loop()
{
  int a;
  float b;
  double c;
  Serial.print("Size of a = ");
  Serial.println(sizeof(a));
  Serial.print("Size of b = ");
  Serial.println(sizeof(b));
  Serial.print("Size of c = ");
  Serial.println(sizeof(c));
  Serial.print("pi = ");
  Serial.println(PI, 5);
  
  // char type
  Serial.print("Size of char is ");
  Serial.print(sizeof(char));
  Serial.println(" bytes");

  // unsigned char type
  Serial.print("Size of unsigned char is ");
  Serial.print(sizeof(unsigned char));
  Serial.println(" bytes");

  // int type
  Serial.print("Size of int is ");
  Serial.print(sizeof(int));
  Serial.println(" bytes");

  // unsigned int type
  Serial.print("Size of unsigned int is ");
  Serial.print(sizeof(unsigned int));
  Serial.println(" bytes");

  // long type
  Serial.print("Size of long is ");
  Serial.print(sizeof(long));
  Serial.println(" bytes");

  // unsigned long type
  Serial.print("Size of unsigned long is ");
  Serial.print(sizeof(unsigned long));
  Serial.println(" bytes");

  // float type
  Serial.print("Size of float is ");
  Serial.print(sizeof(float));
  Serial.println(" bytes");

  // double type
  Serial.print("Size of double is ");
  Serial.print(sizeof(double));
  Serial.println(" bytes");

  Serial.print("\nCHAR_MIN is ");
  Serial.println(CHAR_MIN);

  Serial.print("CHAR_MAX is ");
  Serial.println(CHAR_MAX);

  Serial.print("UCHAR_MAX is ");
  Serial.println(UCHAR_MAX);

  Serial.print("INT_MIN is ");
  Serial.println(INT_MIN);

  Serial.print("INT_MAX is ");
  Serial.println(INT_MAX);

  Serial.print("UINT_MAX is ");
  Serial.println(UINT_MAX);

  Serial.print("LONG_MIN is ");
  Serial.println(LONG_MIN);

  Serial.print("LONG_MAX is ");
  Serial.println(LONG_MAX);

  Serial.print("ULONG_MAX is ");
  Serial.println(ULONG_MAX);

  while (1);                          // Dynamic halt of the program
}

/*
  Size of char is 1 bytes
  Size of unsigned char is 1 bytes
  Size of int is 4 bytes
  Size of unsigned int is 4 bytes
  Size of long is 4 bytes
  Size of unsigned long is 4 bytes
  Size of float is 4 bytes
  Size of double is 8 bytes
  
  CHAR_MIN is 0 (?)
  CHAR_MAX is 255 (?)
  UCHAR_MAX is 255
  INT_MIN is -2147483648
  INT_MAX is 2147483647
  UINT_MAX is 4294967295
  LONG_MIN is -2147483648
  LONG_MAX is 2147483647
  ULONG_MAX is 4294967295
*/