05 February 2020 10:19:27 AM

BIG_INTS_REAL:
  C++ version
  Examine the transfer of integer values into and out of real variables.

TEST01
  Compute the largest possible integers.
  Try to store them as real values.
  Then copy them back.

  'Huge' integers and huge reals:

  i4 = INT_MAX   = 2147483647
  i8 = LLONG_MAX = 9223372036854775807
  r4 = FLT_MAX   = 3.40282e+38
  r8 = DBL_MAX   = 1.79769e+308

  Convert huge integers to real values:

  r4i4 = ( float ) ( i4 )  = 2.14748e+09
  r4i8 = ( float ) ( i8 )  = 9.22337e+18
  r8i4 = ( double ) ( i4 ) = 2.14748e+09
  r8i8 = ( double ) ( i8 ) = 9.22337e+18

  Convert real values of integers back to integers:

  i4r4i4 = ( int ) ( r4i4 )           = -2147483648
  i4r8i4 = ( int ) ( r8i4 )           = 2147483647
  i8r4i8 = ( long long int ) ( r4i8 ) = -9223372036854775808
  i8r8i8 = ( long long int ) ( r8i8 ) = -9223372036854775808

BIG_INTS_REAL:
  Normal end of execution.

05 February 2020 10:19:27 AM