home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Amiga MA Magazine 1998 #6
/
amigamamagazinepolishissue1998.iso
/
coders
/
f2c
/
f77lib
/
pow_ri.c
< prev
next >
Wrap
C/C++ Source or Header
|
2000-06-22
|
348b
|
35 lines
#include "f2c.h"
#ifdef KR_headers
double pow_ri(ap, bp) real *ap; integer *bp;
#else
double pow_ri(real *ap, integer *bp)
#endif
{
double pow, x;
integer n;
pow = 1;
x = *ap;
n = *bp;
if(n != 0)
{
if(n < 0)
{
n = -n;
x = 1/x;
}
for( ; ; )
{
if(n & 01)
pow *= x;
if(n >>= 1)
x *= x;
else
break;
}
}
return(pow);
}