io_int.cc  :  integer numbers in-out
ioenum.cc  :  enumerations
op_num.cc  :  numeric operations
subfun.cc  :  function calls
recfun.cc  :  recursive function
ovfunc.cc  :  functions overloading
argcom.cc  :  main functions parameters
op_ptr.cc  :  operations with pointers
op_arr.cc  :  operations with arrays
arrstr.cc  :  strings as character arrays
ptrfun.cc  :  function arguments by reference
arrdyn.cc  :  dynamic memory handling
pcasts.cc  :  const casts and reinterpret casts
apvoid.cc  :  array of pointers to void
i_loop.cc  :  input in a loop
iofile.cc  :  in-out with files
ioform.cc  :  formatted output
iofstd.cc  :  C-style formatted output
iofstr.cc  :  in-out with strings
linein.cc  :  input by line
iofbin.cc  :  binary write
iofbck.cc  :  binary read

to compile:
c++ -Wall -o io_int io_int.cc
c++ -Wall -o ioenum ioenum.cc
c++ -Wall -o op_num op_num.cc
c++ -Wall -o subfun subfun.cc
c++ -Wall -o recfun recfun.cc
c++ -Wall -o ovfunc ovfunc.cc
c++ -Wall -o argcom argcom.cc
c++ -Wall -o op_ptr op_ptr.cc
c++ -Wall -o op_arr op_arr.cc
c++ -Wall -o arrstr arrstr.cc
c++ -Wall -o ptrfun ptrfun.cc
c++ -Wall -o arrdyn arrdyn.cc
c++ -Wall -o pcasts pcasts.cc
c++ -Wall -o apvoid apvoid.cc
c++ -Wall -o i_loop i_loop.cc
c++ -Wall -o iofile iofile.cc
c++ -Wall -o ioform ioform.cc
c++ -Wall -o iofstd iofstd.cc
c++ -Wall -o iofstr iofstr.cc
c++ -Wall -o linein linein.cc
c++ -Wall -o iofbin iofbin.cc
c++ -Wall -o iofbck iofbck.cc
