Primitive type sizes.

int main() {
  typedef
  struct fv {
    char name[20];
    size_t sz;
  } fv;
  fv types[] = {
    { "char",         sizeof(char), },
    { "short",        sizeof(short), },
    { "int",          sizeof(int), },
    { "long",         sizeof(long), },
    { "long long",    sizeof(long long), },
    { "float",        sizeof(float), },
    { "double",       sizeof(double), },
    { "long double",  sizeof(long double), },
  };
  size_t types_s = sizeof(types);
  size_t types_e = types_s / sizeof(*types);

  for (size_t e_ = 0; e_ < types_e; ++e_) {
    char * name = types[e_].name;
    size_t size = types[e_].sz;
    printf("size of %16s %2zu\n", name, size);
  }
  return 0;
}