eg90以格式化方式读写流文件\d.dat
..........................\Debug\eg90.exe
..........................\.....\eg90.obj
..........................\.....\eg90.pdb
..........................\.....\vc60.pdb
..........................\eg90.cpp
..........................\eg90.dsp
..........................\eg90.dsw
..........................\eg90.ncb
..........................\eg90.opt
..........................\eg90.plg
..........................\Debug
eg90以格式化方式读写流文件