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The C and C++ Include Header Files

cat -n /usr/include/X11/bitmaps/1x1

     1	#define 1x1_width 16
     2	#define 1x1_height 16
     3	static char 1x1_bits[] = {
     4	   0xff, 0xff, 0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff, 0x55, 0x55,
     5	   0xff, 0xff, 0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff, 0x55, 0x55,
     6	   0xff, 0xff, 0x55, 0x55, 0xff, 0xff, 0x55, 0x55};