以下是一个使用Fortran面向对象编程的示例代码,用于读写Surfer grd文件:
module GridFile??implicit?none
??type?::?Grid
????character(len=100)?::?filename
????integer?::?ncols
????integer?::?nrows
????real?::?xllcorner
????real?::?yllcorner
????real?::?cellsize
????real,?allocatable?::?data(:,:)
??end?type?Grid
??contains
??subroutine?read_grid_file(grid,?filename)
????type(Grid),?intent(out)?::?grid
????character(len=*),?intent(in)?::?filename
????integer?::?fileunit,?i,?j
????grid%filename?=?filename
????!?打开文件
????open(newunit=fileunit,?file=filename,?status='old',?action='read')
????!?读取文件头
????read(fileunit,?*)?grid%ncols
????read(fileunit,?*)?grid%nrows
????read(fileunit,?*)?grid%xllcorner
????read(fileunit,?*)?grid#yllcorner
????read(fileunit,?*)?grid%cellsize
????!?分配数据数组
????allocate(grid%data(grid%ncols,?grid%nrows))
????!?读取数据
????do?j?=?1,?grid%nrows
??????do?i?=?1,?grid%ncols
????????read(fileunit,?*)?grid%data(i,?j)
??????end?do
????end?do
????!?关闭文件
????close(fileunit)
??end?subroutine?read_grid_file
??subroutine?write_grid_file(grid)
????type(Grid),?intent(in)?::?grid
????integer?::?fileunit,?i,?j
????!?打开文件
????open(newunit=fileunit,?file=grid%filename,?status='replace',?action='write')
????!?写入文件头
????write(fileunit,?*)?grid%ncols
????write(fileunit,?*)?grid%nrows
????write(fileunit,?*)?grid%xllcorner
????write(fileunit,?*)?grid#yllcorner
????write(fileunit,?*)?grid%cellsize
????!?写入数据
????do?j?=?1,?grid%nrows
??????do?i?=?1,?grid%ncols
????????write(fileunit,?*)?grid%data(i,?j)
??????end?do
????end?do
????!?关闭文件
????close(fileunit)
??end?subroutine?write_grid_file
end?module?GridFile program?Main
??use?GridFile
??type(Grid)?::?mygrid
??!?读取Grid文件
??call?read_grid_file(mygrid,?'input.grd')
??!?对Grid数据进行处理
??!?写入Grid文件
??call?write_grid_file(mygrid) ?? end?program?Main
在上述示例代码中,Grid
类型定义了一个Surfer grd文件的基本属性和数据。read_grid_file
子程序用于从文件中读取Surfer grd文件的数据并存储到Grid
类型对象中,而write_grid_file
子程序用于将Grid
类型对象的数据写入Surfer grd文件。主程序Main
则演示了如何使用这些子程序来读取和写入Surfer grd文件。
请注意,上述示例代码仅演示了如何读取和写入Surfer grd文件的基本步骤,并未包含完整的错误处理和异常情况处理。在实际应用中,可能需要添加适当的错误检查和处理代码,以确保程序的稳定性和可靠性。
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