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在Linux下,我正在編寫一個Ghostscript程序來讀取一個相當長的(1320行)經度和緯度座標數據文件(一個安裝了Gnuplot的文件)最終繪製一張地圖。我寫了各種測試文件,最新的是讀取數據並使用show和showpage
顯示每行,以檢查讀取的行是否與輸入文件匹配。我想在每個showpage
之後暫停程序的執行,直到按下一個鍵。請,我該怎麼做?在Ghostscript中我怎樣才能暫停輸出到屏幕
這是我的鍵盤輸入測試程序。我希望它可能需要顯著的變化:
%!
% Testing Keyboard input
%
% Depictions of the stack have top on the right
%
/Courier findfont 16 scalefont setfont
% string needs a size and leaves the created string on the stack.
/s 15 string def % longer string stores /00 in extra places in outfile ..
/lcount 0 def
/vpos 750 def /nl 0 def
/newline {72 vpos moveto /vpos vpos 12 sub def} def
/inputfile (/dev/tty) (r) file def
%/inputfile (/home/Harry/Mercator/world.dat) (r) file def
/getdataline dataline into s ++> true, or false at end of file
{ /lcount 1 lcount add def
inputfile s readline % was readstring
} def
{ 0 1 14 { s exch 0 put }for % clears string s to nulls
getdataline
{newline s show} % got a line
{exit} % end of file
ifelse
showpage
% ******* I want to pause here *******
} loop
inputfile closefile