ch04
....\block_example.c.c
....\buff_type_test.c
....\char_example.c
....\cp_example.c
....\feof_example.c
....\fopen_example.c.c
....\format_example.c
....\fseek_example.c
....\length_example.c
....\ptr_struct_file.c
....\setbuf_example.c
....\string_example.c.c