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The C and C++ Include Header Files

cat -n /usr/include/X11/bitmaps/2x2

     1	#define 2x2_width 16
     2	#define 2x2_height 16
     3	static char 2x2_bits[] = {
     4	   0xff, 0xff, 0xff, 0xff, 0x33, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff,
     5	   0x33, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0x33, 0x33, 0x33, 0x33,
     6	   0xff, 0xff, 0xff, 0xff, 0x33, 0x33, 0x33, 0x33};