li913 发表于 2023-12-15 11:20
product(x(i)-y,y/=x(i))

谢谢您的帮助，已解决

谢谢大佬，已经解决了

[Fortran] syntaxhighlighter_viewsource syntaxhighlighter_copycode

Subroutine Wii_()
Implicit none
real*8::x(11),y(11),pi=3.141592653589793,L
Integer::N,i,j
L=1
N=11
Do i=1,N,1
    x(i)=(L/2)*(1-cos(((i-1)/(N-1))*pi))
Do j=1,N,1
y(j)=(L/2)*(1-cos(((j-1)/(N-1))*pi))
  END Do
  END Do
end Subroutine Wii_
    
    program main_mik
    Implicit real*8(a-z)
    real*8::G(1),W(1),x(11),y(11)
    Integer::k
    k=1
call  Wii_()
 G(k)=product(x(i)-y(j),y(j)/=x(i))
 W(k)=1/G(k)
  write(*,*)"W(k)=W(k)"
  end program main_mik

product(x(i)-y,y/=x(i))