fortran循环，求助！！

ttt

我要编一个简单的循环程序，不太会，刚学，求指导，底下是我编的一个模子program main
implicit none
real*8 A,B,C,D,ref,Z0,Zi
real*8 E,H
real*8 daltf,f,s
real*8 A2,A3,A4,As,Al,A1
real,parameter::pi=3.14159
real i
integer,parameter::Zrs=5
integer k
real*8::Zr(Zrs)=(/2.0,4.0,6.0,8.0,10.0/)
common /group1/Zi
common /group2/Z0

do k=1,Zrs
  call Get_ref(Zr(k),E(k),H(k),ref(k))
write(*,*) k,ref(k),daltf/35.0
end do
stop
end
!!!!!!!!!
Z0=50.0
Zi=-3.0
!!!!!!!!
daltf=0  !!频率的变化
do i=0,0.35,0.0001

daltf=daltf+i

end do
write(*,*) daltf
end
stop

As=0.015*(1+daltf/35.0)
A2=0.25*(1+daltf/35.0)
A3=0.0689*(1+daltf/35.0)
A4=0.419*(1+daltf/35.0)
Al=0.4808*(1+daltf/35.0)
!!A1
A1=(1.0/2.0*pi)*atan(1.0/(1.0/tan(2.0*pi*As)+1.0/tan(2.0*pi*Al)))

A=(cos(2.0*pi*A2)+sin(2.0*pi*A2)/tan(2.0*pi*A3))*cos(2.0*pi*A4)-sin(2.0*pi*A2)*sin(2.0*pi*A4)

B=((cos(2.0*pi*A2)+sin(2.0*pi*A2)/tan(2.0*pi*A3))*sin(2.0*pi*A4)+sin(2.0*pi*A2)*cos(2.0*pi*A4))*Z0

C=((-1.0/tan(2.0*pi*A1)*cos(2.0*pi*A2)+sin(2.0*pi*A2)-(1.0/tan(2.0*pi*A1)*sin(2.0*pi*A2)+cos(2.0*pi*A2))/tan(2.0*pi*A3))*cos(2.0*pi*A4)+(1.0/tan(2.0*pi*A1)*sin(2.0*pi*A2)+cos(2.0*pi*A2))*sin(2.0*pi*A4))/Z0

D=(1.0/tan(2.0*pi*A1)*cos(2.0*pi*A2)-sin(2.0*pi*A2)+(1.0/tan(2.0*pi*A1)*sin(2.0*pi*A2)+cos(2.0*pi*A2))/tan(2.0*pi*A3))*sin(2.0*pi*A4)+(1.0/tan(2.0*pi*A1)*sin(2.0*pi*A2)+cos(2.0*pi*A2))*cos(2.0*pi*A4)
!!!E的表达式
subroutine Zr_to_E(Zr,E)
implicit none
real*8 A,B,C,D,E
real*8 Zr,Z0,Zi
common /group1/Zi
common /group2/Z0

E=(A*Zr*(D-C*Zi)+C*Zr*(B+A*Zi))/(((D-C*Zi)**2+Zr**2*C**2)*Z0)

return
end
!!!H的表达式
subroutine Zr_H(Zr,H)
implicit none
real*8 A,B,C,D,Zr,Zi,Z0,H
common /group1/Zi
common /group2/Z0

H=((B+A*Zi)*(D-C*Zi)-A*C*Zr**2)/(((D-C*Zi)**2+Zr**2*C**2)*Z0)

return
end
!!!ref反射系数
subroutine Get_ref(Zr,E,H,ref)
implicit none
real*8 E,H,Zr,ref

call Zr_to_E(Zr,E)
call Zr_H(Zr,H)

ref=((E**2-1+H**2)**2+4*H**2)/(((E+1)**2+H**2)**2)
return
end

ttt

fcode 发表于 2014-4-27 15:06
这是你的算法，你比我更清楚。

我没有足够的时间阅读你的代码，并从中理解你的算法，并针对算法给你建议 ...

嗯，特感激，哇哈哈，谢谢你，祝你开心！！！

fcode

ttt 发表于 2014-4-27 14:58
我有两个参数变化呢，daltf, Zr啊，我该怎么做啊

这是你的算法，你比我更清楚。

我没有足够的时间阅读你的代码，并从中理解你的算法，并针对算法给你建议。

我只能从 Fortran语法 角度给你意见。

ttt

fcode 发表于 2014-4-27 13:11
Get_A1 就是 Dalt_To_A1 这是你的想法，编译器并不知道你的想法。你缺少 Dalt_To_A1，编译器就不让你运行。 ...

我有两个参数变化呢，daltf, Zr啊，我该怎么做啊

fcode

Get_A1 就是 Dalt_To_A1 这是你的想法，编译器并不知道你的想法。你缺少 Dalt_To_A1，编译器就不让你运行。

E H REF 也一样。

ttt

fcode 发表于 2014-4-27 11:21
没有写 DALTF_TO_A1 函数（子程序）

主程序中 E H REF 是什么？如果是数组，要定义，如果是函数（子程序） ...

主程序就是直接调用底下的子程序，你说如果是子程序要写出来，是什么意思啊，Get_A1就是你说的dalt_to_A1，我还觉得挺清晰的，好吧，谢谢你的指导，相当感激

fcode

没有写 DALTF_TO_A1 函数（子程序）

主程序中 E H REF 是什么？如果是数组，要定义，如果是函数（子程序），要写出来。

我感觉你的函数命名很乱

ttt

各种感激不尽，改完之后出现这种错误是怎么回事啊
Linking...
tu11.obj : error LNK2001: unresolved external symbol _E@4
tu11.obj : error LNK2001: unresolved external symbol _H@4
tu11.obj : error LNK2001: unresolved external symbol _REF@4
tu11.obj : error LNK2001: unresolved external symbol _DALTF_TO_A1@8
Debug/tu11.exe : fatal error LNK1120: 4 unresolved externals
Error executing link.exe.

程序是这样的

[Fortran] 纯文本查看 复制代码

program main
implicit none
real*8 A,B,C,D,ref,Z0,Zi
real*8 E,H
real*8 f,s
real*8 A2,A3,A4,As,Al,A1
real,parameter::pi=3.14159
integer,parameter::Zrs=5
integer k
real*8::Zr(Zrs)=(/2.0,4.0,6.0,8.0,10.0/)
common /group1/Zi
common /group2/Z0
real::daltf=0.0
integer i
!!!!!!!!!
Z0=50.0
Zi=-3.0
!!!!!!!!
do i=1,int(0.35/0.001)
  do k=1,Zrs
 daltf=daltf+0.001
  call Get_ref(Zr(k),E(k),H(k),ref(k))
write(*,*) k,ref(k)
write(*,*) daltf

end do
end do
stop
end
!!!!!!!As,A2,A3,A4,Al*************************
subroutine daltf_to_As(daltf,As)
implicit none
real*8 daltf,As
As=0.015*(1+daltf/35.0)
return
end

subroutine daltf_to_A2(daltf,A2)
implicit none
real*8 daltf,A2
A2=0.25*(1+daltf/35.0)
return
end

subroutine daltf_to_A3(daltf,A3)
implicit none
real*8 daltf,A3
A3=0.0689*(1+daltf/35.0)
return
end

subroutine daltf_to_A4(daltf,A4)
implicit none
real*8 daltf,A4
A4=0.419*(1+daltf/35.0)
return
end

subroutine daltf_to_Al(daltf,Al)
implicit none
real*8 daltf,Al
Al=0.4808*(1+daltf/35.0)
return
end
!!!!!!!!****************************************
!!A1,A,B,C,D************************************
subroutine Get_A1(daltf,As,Al,A1)
implicit none
real*8 As,Al,A1,daltf
real,parameter::pi=3.14159

call daltf_to_As(daltf,As)
call daltf_to_A1(daltf,Al)

A1=(1.0/2.0*pi)*atan(1.0/(1.0/tan(2.0*pi*As)+1.0/tan(2.0*pi*Al)))
return
end

subroutine Get_AB(daltf,A2,A3,A4,A,B)
implicit none
real*8 A2,A3,A4,A,B,Z0,daltf
real,parameter::pi=3.14259
common /group2/Z0

call daltf_to_A2(daltf,A2)
call daltf_to_A3(daltf,A3)
call daltf_to_A4(daltf,A4)

A=(cos(2.0*pi*A2)+sin(2.0*pi*A2)/tan(2.0*pi*A3))*cos(2.0*pi*A4)-sin(2.0*pi*A2)*sin(2.0*pi*A4)
B=((cos(2.0*pi*A2)+sin(2.0*pi*A2)/tan(2.0*pi*A3))*sin(2.0*pi*A4)+sin(2.0*pi*A2)*cos(2.0*pi*A4))*Z0
return
end

subroutine Get_CD(daltf,A1,A2,A3,A4,C,D)
implicit none
real*8 A1,A2,A3,A4,Z0,C,D,daltf,Al,As
real,parameter::pi=3.14259
common /group2/Z0

call Get_A1(daltf,As,Al,A1)
call daltf_to_A2(daltf,A2)
call daltf_to_A3(daltf,A3)
call daltf_to_A4(daltf,A4)

C=((-1.0/tan(2.0*pi*A1)*cos(2.0*pi*A2)+sin(2.0*pi*A2)-(1.0/tan(2.0*pi*A1)*sin(2.0*pi*A2)+cos(2.0*pi*A2))/tan(2.0*pi*A3))*cos(2.0*pi*A4)+(1.0/tan(2.0*pi*A1)*sin(2.0*pi*A2)+cos(2.0*pi*A2))*sin(2.0*pi*A4))/Z0

D=(1.0/tan(2.0*pi*A1)*cos(2.0*pi*A2)-sin(2.0*pi*A2)+(1.0/tan(2.0*pi*A1)*sin(2.0*pi*A2)+cos(2.0*pi*A2))/tan(2.0*pi*A3))*sin(2.0*pi*A4)+(1.0/tan(2.0*pi*A1)*sin(2.0*pi*A2)+cos(2.0*pi*A2))*cos(2.0*pi*A4)
return
end
!!!*********************************************
!!!E的表达式
subroutine Get_E(Zr,A1,A2,A3,A4,E)
implicit none
real*8 A,B,C,D,E,A1,A2,A3,A4,daltf
real*8 Zr,Z0,Zi
common /group1/Zi
common /group2/Z0

call Get_AB(daltf,A2,A3,A4,A,B)
call Get_CD(daltf,A1,A2,A3,A4,C,D)

E=(A*Zr*(D-C*Zi)+C*Zr*(B+A*Zi))/(((D-C*Zi)**2+Zr**2*C**2)*Z0)

return
end
!!!H的表达式
subroutine Get_H(Zr,A1,A2,A3,A4,H)
implicit none
real*8 A,B,C,D,Zr,Zi,Z0,H,A1,A2,A3,A4,daltf
common /group1/Zi
common /group2/Z0

call Get_AB(daltf,A2,A3,A4,A,B)
call Get_CD(daltf,A1,A2,A3,A4,C,D)

H=((B+A*Zi)*(D-C*Zi)-A*C*Zr**2)/(((D-C*Zi)**2+Zr**2*C**2)*Z0)

return
end
!!!ref反射系数
subroutine Get_ref(Zr,E,H,ref)
implicit none
real*8 E,H,Zr,ref,A1,A2,A3,A4

call Get_E(Zr,A1,A2,A3,A4,E)
call Get_H(Zr,A1,A2,A3,A4,H)

ref=((E**2-1+H**2)**2+4*H**2)/(((E+1)**2+H**2)**2)
return
end

fcode

问题1：

[Fortran] 纯文本查看 复制代码

!!!!!!!!!
 Z0=50.0
 Zi=-3.0
 !!!!!!!!
 real::daltf=0.0
 integer i

换一下位置

[Fortran] 纯文本查看 复制代码

 real::daltf=0.0
 integer i
!!!!!!!!!
 Z0=50.0
 Zi=-3.0
 !!!!!!!!

Fortran 里的声明语句必须在所有执行语句前面

问题2：
Get_A1 函数有4个参数，但调用时只给了3个

ttt

chuxf 发表于 2014-4-25 19:53
1.我建议你写成一个函数，把daltf当做参数传递进去，然后循环调用这个函数既可。
2.这样写不行。要这样循环 ...

那个啥，我改完后有几个错误还是解决不了，麻烦你给指导指导，谢谢

[Fortran] 纯文本查看 复制代码

program main
implicit none
real*8 A,B,C,D,ref,Z0,Zi
real*8 E,H
real*8 f,s
real*8 A2,A3,A4,As,Al,A1
real,parameter::pi=3.14159
integer,parameter::Zrs=5
integer k
real*8::Zr(Zrs)=(/2.0,4.0,6.0,8.0,10.0/)
common /group1/Zi
common /group2/Z0
!!!!!!!!!
Z0=50.0
Zi=-3.0
!!!!!!!!
real::daltf=0.0
integer i
do i=1,int(0.35/0.001)
  do k=1,Zrs
daltf=daltf+0.001
  call Get_ref(Zr(k),E(k),H(k),ref(k))
write(*,*) k,ref(k)
write(*,*) daltf

end do
end do
stop
end
!!!!!!!As,A2,A3,A4,Al*************************
subroutine daltf_to_As(daltf,As)
implicit none
real*8 daltf,As
As=0.015*(1+daltf/35.0)
return
end

subroutine daltf_to_A2(daltf,A2)
implicit none
real*8 daltf,A2
A2=0.25*(1+daltf/35.0)
return
end

subroutine daltf_to_A3(daltf,A3)
implicit none
real*8 daltf,A3
A3=0.0689*(1+daltf/35.0)
return
end

subroutine daltf_to_A4(daltf,A4)
implicit none
real*8 daltf,A4
A4=0.419*(1+daltf/35.0)
return
end

subroutine daltf_to_Al(daltf,Al)
implicit none
real*8 daltf,Al
Al=0.4808*(1+daltf/35.0)
return
end
!!!!!!!!****************************************
!!A1,A,B,C,D************************************
subroutine Get_A1(daltf,As,Al,A1)
implicit none
real*8 As,Al,A1,daltf
real,parameter::pi=3.14159

call daltf_to_As(daltf,As)
call daltf_to_A1(daltf,Al)

A1=(1.0/2.0*pi)*atan(1.0/(1.0/tan(2.0*pi*As)+1.0/tan(2.0*pi*Al)))
return
end

subroutine Get_AB(daltf,A2,A3,A4,A,B)
implicit none
real*8 A2,A3,A4,A,B,Z0,daltf
real,parameter::pi=3.14259
common /group2/Z0

call daltf_to_A2(daltf,A2)
call daltf_to_A3(daltf,A3)
call daltf_to_A4(daltf,A4)

A=(cos(2.0*pi*A2)+sin(2.0*pi*A2)/tan(2.0*pi*A3))*cos(2.0*pi*A4)-sin(2.0*pi*A2)*sin(2.0*pi*A4)
B=((cos(2.0*pi*A2)+sin(2.0*pi*A2)/tan(2.0*pi*A3))*sin(2.0*pi*A4)+sin(2.0*pi*A2)*cos(2.0*pi*A4))*Z0
return
end

subroutine Get_CD(daltf,A1,A2,A3,A4,C,D)
implicit none
real*8 A1,A2,A3,A4,Z0,C,D,daltf,Al,As
real,parameter::pi=3.14259
common /group2/Z0

call Get_A1(As,Al,A1)
call daltf_to_A2(daltf,A2)
call daltf_to_A3(daltf,A3)
call daltf_to_A4(daltf,A4)

C=((-1.0/tan(2.0*pi*A1)*cos(2.0*pi*A2)+sin(2.0*pi*A2)-(1.0/tan(2.0*pi*A1)*sin(2.0*pi*A2)+cos(2.0*pi*A2))/tan(2.0*pi*A3))*cos(2.0*pi*A4)+(1.0/tan(2.0*pi*A1)*sin(2.0*pi*A2)+cos(2.0*pi*A2))*sin(2.0*pi*A4))/Z0

D=(1.0/tan(2.0*pi*A1)*cos(2.0*pi*A2)-sin(2.0*pi*A2)+(1.0/tan(2.0*pi*A1)*sin(2.0*pi*A2)+cos(2.0*pi*A2))/tan(2.0*pi*A3))*sin(2.0*pi*A4)+(1.0/tan(2.0*pi*A1)*sin(2.0*pi*A2)+cos(2.0*pi*A2))*cos(2.0*pi*A4)
return
end
!!!*********************************************
!!!E的表达式
subroutine Get_E(Zr,A1,A2,A3,A4,E)
implicit none
real*8 A,B,C,D,E,A1,A2,A3,A4
real*8 Zr,Z0,Zi
common /group1/Zi
common /group2/Z0

call Get_AB(A2,A3,A4,A,B)
call Get_CD(A1,A2,A3,A4,C,D)

E=(A*Zr*(D-C*Zi)+C*Zr*(B+A*Zi))/(((D-C*Zi)**2+Zr**2*C**2)*Z0)

return
end
!!!H的表达式
subroutine Get_H(Zr,A1,A2,A3,A4,H)
implicit none
real*8 A,B,C,D,Zr,Zi,Z0,H,A1,A2,A3,A4
common /group1/Zi
common /group2/Z0

call Get_AB(A2,A3,A4,A,B)
call Get_CD(A1,A2,A3,A4,C,D)

H=((B+A*Zi)*(D-C*Zi)-A*C*Zr**2)/(((D-C*Zi)**2+Zr**2*C**2)*Z0)

return
end
!!!ref反射系数
subroutine Get_ref(Zr,E,H,ref)
implicit none
real*8 E,H,Zr,ref,A1,A2,A3,A4

call Get_E(Zr,A1,A2,A3,A4,E)
call Get_H(Zr,A1,A2,A3,A4,H)

ref=((E**2-1+H**2)**2+4*H**2)/(((E+1)**2+H**2)**2)
return
end

以下是错误提示
-------------------Configuration: tu11 - Win32 Debug--------------------
Compiling Fortran...
C:\Program Files\Microsoft Visual Studio\MyProjects\tu11\tu11.f90
C:\Program Files\Microsoft Visual Studio\MyProjects\tu11\tu11.f90(17) : Error: A specification statement cannot appear in the executable section.
real::daltf=0.0
^
C:\Program Files\Microsoft Visual Studio\MyProjects\tu11\tu11.f90(19) : Error: A specification statement cannot appear in the executable section.
integer i
^
C:\Program Files\Microsoft Visual Studio\MyProjects\tu11\tu11.f90(20) : Error: This name does not have a type, and must have an explicit type.   [I]
do i=1,int(0.35/0.001)
---^
C:\Program Files\Microsoft Visual Studio\MyProjects\tu11\tu11.f90(20) : Error: An INTEGER or REAL data type is required in this context.   [I]
do i=1,int(0.35/0.001)
---^
C:\Program Files\Microsoft Visual Studio\MyProjects\tu11\tu11.f90(22) : Error: This name does not have a type, and must have an explicit type.   [DALTF]
daltf=daltf+0.001
-^
Error executing df.exe.

tu11.obj - 5 error(s), 0 warning(s)

ttt

chuxf 发表于 2014-4-25 19:53
1.我建议你写成一个函数，把daltf当做参数传递进去，然后循环调用这个函数既可。
2.这样写不行。要这样循环 ...

好，我试试，谢谢你，哇哈哈