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资源说明：Simple text based "graphical editor". Solution to a little code challenge.
Graphical editors allow users to edit images in the same way text editors let us modify documents. Images are represented as an M x N array of pixels with each pixel given colour. Produce a program that simulates a simple interactive graphical editor. Input The input consists of a line containing a sequence of commands. Each command is represented by a single capital letter at the start of the line. Arguments to the command are separated by spaces and follow the command character. Pixel co-ordinates are represented by a pair of integers: 1) a column number between 1 and M, and 2) a row number between 1 and N. Where 1 <= M, N <= 250. The origin sits in the upper-left of the table. Colours are specified by capital letters. Commands The editor supports 7 commands: 1. I M N. Create a new M x N image with all pixels coloured white (O). 2. C. Clears the table, setting all pixels to white (O). 3. L X Y C. Colours the pixel (X,Y) with colour C. 4. V X Y1 Y2 C. Draw a vertical segment of colour C in column X between rows Y1 and Y2(inclusive). 5. H X1 X2 Y C. Draw a horizontal segment of colour C in row Y between columns X1 and X2 (inclusive). 6. F X Y C. Fill the region R with the colour C. R is defined as: Pixel (X,Y) belongs to R. Any other pixel which is the same colour as (X,Y) and shares a common side with any pixel in R also belongs to this region. 7. S. Show the contents of the current image 8. X. Terminate the session
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