Category : C Source Code
Archive   : RECIPEX.ZIP
Filename : RTFLSP.C

 
Output of file : RTFLSP.C contained in archive : RECIPEX.ZIP
#include

#define MAXIT 30

float rtflsp(func,x1,x2,xacc)
float x1,x2,xacc;
float (*func)(); /* ANSI: float (*func)(float); */
{
int j;
float fl,fh,xl,xh,swap,dx,del,f,rtf;
void nrerror();

fl=(*func)(x1);
fh=(*func)(x2);
if (fl*fh > 0.0) nrerror("Root must be bracketed in RTFLSP");
if (fl < 0.0) {
xl=x1;
xh=x2;
} else {
xl=x2;
xh=x1;
swap=fl;
fl=fh;
fh=swap;
}
dx=xh-xl;
for (j=1;j<=MAXIT;j++) {
rtf=xl+dx*fl/(fl-fh);
f=(*func)(rtf);
if (f < 0.0) {
del=xl-rtf;
xl=rtf;
fl=f;
} else {
del=xh-rtf;
xh=rtf;
fh=f;
}
dx=xh-xl;
if (fabs(del) < xacc || f == 0.0) return rtf;
}
nrerror("Maximum number of iterations exceeded in RTFLSP");
}

#undef MAXIT


  3 Responses to “Category : C Source Code
Archive   : RECIPEX.ZIP
Filename : RTFLSP.C
”

  1. Daniel says:
    January 27, 2013 at 3:59 pm

    Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. Joshie says:
    March 18, 2014 at 4:57 pm

    This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. DiskingRound says:
    January 14, 2015 at 10:57 pm

    But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/