ftp.nice.ch/pub/next/unix/developer/plplot.3.0.s.tar.gz#/plplot/src/plxtik.c

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#include "plplot.h"

void plxtik(x,y,below,above)
int x, y, below, above;
{
      draphy(x,y);
      if (below != 0) draphy(x,y-below);
      if (above != 0) draphy(x,y+above);
      draphy(x,y);
}

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.