#include "pen.h" line(x1, y1, x2, y2) double x1, y1, x2, y2; { if(noscale){ x1 = SCX(x1); y1 = SCY(y1); x2 = SCX(x2); y2 = SCX(y2); } penUp(); fprintf(pltout,"PA %8.2f,%8.2f PD %8.2f,%8.2f\n", x1, y1, x2, y2); penstate = DOWN; ckerr(0); }