mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-03 07:51:16 -05:00
2c17544f3f
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/WSJT/trunk@1 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
75 lines
1.6 KiB
Fortran
75 lines
1.6 KiB
Fortran
SUBROUTINE sort(n,arr)
|
|
INTEGER n,M,NSTACK
|
|
REAL arr(n)
|
|
PARAMETER (M=7,NSTACK=50)
|
|
INTEGER i,ir,j,jstack,k,l,istack(NSTACK)
|
|
REAL a,temp
|
|
jstack=0
|
|
l=1
|
|
ir=n
|
|
1 if(ir-l.lt.M)then
|
|
do 12 j=l+1,ir
|
|
a=arr(j)
|
|
do 11 i=j-1,1,-1
|
|
if(arr(i).le.a)goto 2
|
|
arr(i+1)=arr(i)
|
|
11 continue
|
|
i=0
|
|
2 arr(i+1)=a
|
|
12 continue
|
|
if(jstack.eq.0)return
|
|
ir=istack(jstack)
|
|
l=istack(jstack-1)
|
|
jstack=jstack-2
|
|
else
|
|
k=(l+ir)/2
|
|
temp=arr(k)
|
|
arr(k)=arr(l+1)
|
|
arr(l+1)=temp
|
|
if(arr(l+1).gt.arr(ir))then
|
|
temp=arr(l+1)
|
|
arr(l+1)=arr(ir)
|
|
arr(ir)=temp
|
|
endif
|
|
if(arr(l).gt.arr(ir))then
|
|
temp=arr(l)
|
|
arr(l)=arr(ir)
|
|
arr(ir)=temp
|
|
endif
|
|
if(arr(l+1).gt.arr(l))then
|
|
temp=arr(l+1)
|
|
arr(l+1)=arr(l)
|
|
arr(l)=temp
|
|
endif
|
|
i=l+1
|
|
j=ir
|
|
a=arr(l)
|
|
3 continue
|
|
i=i+1
|
|
if(arr(i).lt.a)goto 3
|
|
4 continue
|
|
j=j-1
|
|
if(arr(j).gt.a)goto 4
|
|
if(j.lt.i)goto 5
|
|
temp=arr(i)
|
|
arr(i)=arr(j)
|
|
arr(j)=temp
|
|
goto 3
|
|
5 arr(l)=arr(j)
|
|
arr(j)=a
|
|
jstack=jstack+2
|
|
if(jstack.gt.NSTACK)pause 'NSTACK too small in sort'
|
|
if(ir-i+1.ge.j-l)then
|
|
istack(jstack)=ir
|
|
istack(jstack-1)=i
|
|
ir=j-1
|
|
else
|
|
istack(jstack)=j-1
|
|
istack(jstack-1)=l
|
|
l=i
|
|
endif
|
|
endif
|
|
goto 1
|
|
END
|
|
C (C) Copr. 1986-92 Numerical Recipes Software *(t9,12.
|