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program main parameter n=600 double precision u(0:n),u1(0:n),x0,x1,x,t0,t1,h,dett,lambda,y(0:n) integer i,j x0=0.0d0 x1=6.0d0 t0=0.0d0 lambda=0.3d0 t1=0.5d0 h=0.01d0 dett=0.003d0 x=x0 !do i=0,n,1 !if(i<=250)then !y(i)=1.0 !else ! y(i)=0 !end if ! end do do i=0,n,1 if(x>=1 .and. x<=3) then u(i)=1.0d0 else u(i)=0.0d0 end if x=x+h end do open(1,file="yingfeng.dat" ![]() t=t0+dett x=x0 do while(t<=t1) x=x0+h do j=1,n,1 u1(j)=u(j)-3*lambda*(u(j)-u(j-1)) if(abs(t-0.5)<=0.0001)then write(1,*)x,u1(j),y(j) end if x=x+h end do do j=1,n-1 u(j)=u1(j) u(0)=1 u(1)=0 end do t=t+dett end do stop end Çó´óÉñÖ¸µ¼£¬ÎªÉ¶Õâ¸ö³ÌÐòÔËÐкóyingfeng.datÎļþÀïÃæÉ¶Êý¾Ý¶¼Ã»ÓÐ |
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