Sizes of data types and pointers in C

datatype_sizes.c

/**
* Sizes of data types and pointers in C
* \author Wesley Gonçalves (@wesleygoncalves)
* 
* You can download this file
* directly to your project from the command-line
* curl -O https://gist.githubusercontent.com/WesleyGoncalves/b914272d146917db37c6937cc2643064/raw/894f67d5e98083281d87a7880da7d04455b2105f/datatype_sizes.c
*/

#include <stdio.h>

int main(void)
{
  // Basic Data Types (signed)
  char   c;
  short  s;
  int    i;
  float  f;
  double d;
  long   l;
  long long ll;
  long double ld;

  // Unsigned data types
  unsigned char  uc;
  unsigned short us;
  unsigned int   ui;
  unsigned long  ul;
  unsigned long long ull;

  // Pointers
  char   *cp = NULL;
  short  *sp = NULL;
  int    *ip = NULL;
  float  *fp = NULL;
  double *dp = NULL;
  long   *lp = NULL;
  long long   *llp = NULL;
  long double *ldp = NULL;
  unsigned char  *ucp = NULL;
  unsigned short *usp = NULL;
  unsigned int   *uip = NULL;
  unsigned long  *ulp = NULL;
  unsigned long long *ullp = NULL;

  printf("BASIC DATA TYPES\n");
  printf("char   %lu bytes\n", sizeof(c));
  printf("short  %lu bytes\n", sizeof(s));
  printf("int    %lu bytes\n", sizeof(i));
  printf("float  %lu bytes\n", sizeof(f));
  printf("double %lu bytes\n", sizeof(d));
  printf("long   %lu bytes\n", sizeof(l));
  printf("long long   %lu bytes\n", sizeof(ll));
  printf("long double %lu bytes\n", sizeof(ld));

  printf("\nUNSIGNED DATA TYPES\n");
  printf("unsigned char  %lu bytes\n", sizeof(uc));
  printf("unsigned short %lu bytes\n", sizeof(us));
  printf("unsigned int   %lu bytes\n", sizeof(ui));
  printf("unsigned long  %lu bytes\n", sizeof(ul));
  printf("unsigned long long %lu bytes\n", sizeof(ull));

  printf("\n---POINTERS---\n");
  printf("char   %lu bytes\n", sizeof(cp));
  printf("short  %lu bytes\n", sizeof(sp));
  printf("int    %lu bytes\n", sizeof(ip));
  printf("float  %lu bytes\n", sizeof(fp));
  printf("double %lu bytes\n", sizeof(dp));
  printf("long   %lu bytes\n", sizeof(lp));
  printf("long long   %lu bytes\n", sizeof(llp));
  printf("long double %lu bytes\n", sizeof(ldp));
  printf("unsigned char  %lu bytes\n", sizeof(ucp));
  printf("unsigned short %lu bytes\n", sizeof(usp));
  printf("unsigned int   %lu bytes\n", sizeof(uip));
  printf("unsigned long  %lu bytes\n", sizeof(ulp));
  printf("unsigned long long %lu bytes\n", sizeof(ullp));
  
  return 0;
}