Ничего не отображается после ввода данных
program g
implicit none
real::q,n,s,z,q2,y,free_board,r,b,e,A,h,t
write(*,100)"pls insert discharge Q ="
read(*,*)q
write(*,100)"please insert Manning coefficient n ="
read(*,*)n
write(*,*)"please insert slope of the hydraulic channel ="
read(*,*)s
write(*,*)"please inset Z ="
read(*,*)z
write(*,*)"how much of b/y do you want?"
write(*,*)"if it not important right 2.5"
read(*,*)e
if(e<2.or.e>5)then
stop
end if
y=0
do
b=y*e
A=b+2*y*((1+Z**2)**(0.5))
R=((b+z*y)*y)/(b+(2*y*(1+z**2)**(0.5)))
h=(1/n)*(r**(2/3))*A*(s)**0.5
if( abs(h-q)<0.01) then
exit
end if
y=0.001+y
end do
free_board=0.2*y
h=free_board+y
t=b+2*y*z
write(*,100)"free board="
write(*,*) free_board
write(*,100)"y="
write(*,*)y
write(*,100)"b="
write(*,*)b
write(*,100)"T="
write(*,100)t
100 format(A)
end program g
это не работает и ничего не показывает после ввода данных