sqrt.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

#ifndef lint
static char sccsid[] = "@(#)sqrt.c	4.3 8/11/83";
#endif

# include "e.h"

sqrt(p2) int p2; {
#ifndef NEQN
	int nps;

	nps = EFFPS(((eht[p2]*9)/10+5)/6);
#endif NEQN
	yyval = p2;
#ifndef NEQN
	eht[yyval] = VERT( (nps*6*12)/10 );
	if(dbg)printf(".\tsqrt: S%d <- S%d;b=%d, h=%d\n", 
		yyval, p2, ebase[yyval], eht[yyval]);
	if (rfont[yyval] == ITAL)
		printf(".as %d \\|\n", yyval);
#endif NEQN
	nrwid(p2, ps, p2);
#ifndef NEQN
	printf(".ds %d \\v'%du'\\s%d\\v'-.2m'\\(sr\\l'\\n(%du\\(rn'\\v'.2m'\\s%d", 
		yyval, ebase[p2], nps, p2, ps);
	printf("\\v'%du'\\h'-\\n(%du'\\*(%d\n", -ebase[p2], p2, p2);
	lfont[yyval] = ROM;
#else NEQN
	printf(".ds %d \\v'%du'\\e\\L'%du'\\l'\\n(%du'",
		p2, ebase[p2], -eht[p2], p2);
	printf("\\v'%du'\\h'-\\n(%du'\\*(%d\n", eht[p2]-ebase[p2], p2, p2);
	eht[p2] += VERT(1);
	if(dbg)printf(".\tsqrt: S%d <- S%d;b=%d, h=%d\n", 
		p2, p2, ebase[p2], eht[p2]);
#endif NEQN
}