收到，程序正常了，谢谢老师

15235312522 发表于 2020-6-30 16:32
好的
program test0503
implicit none

[Fortran] 纯文本查看 复制代码

program test0503
implicit none
integer age
real income,tax

write(*,*) "Input your age:"
read(*,*) age
write(*,*) "Input your income:"
read(*,*) income

select case(age)
case(0:49)
if(income>=0.0.and.income<=1000.0) then
  tax=income*0.03
else if(income>1000.0.and.income<=5000.0) then
  tax=income*0.10
else if(income>5000.0) then
  tax=income*0.15
else if(income<0.0) then
!这个地方用了elseif就要用then
 tax=0
end if
case(50:)
if(income>=0.0.and.income<=1000.0) tax=income*0.05
if(income>1000.0.and.income<=5000.0) tax=income*0.07
if(income>5000.0) tax=income*0.10
if(income<0.0)  tax=0
case default
  tax=0
end select

write(*,*) "Tax:"
write(*,*) tax

stop
end

好的

[Fortran] 纯文本查看 复制代码

program test0503
implicit none
integer age
real income,tax

write(*,*) "Input your age:"
read(*,*) age
write(*,*) "Input your income:"
read(*,*) income

select case(age)
case(0:49)
if(income>=0.0.and.income<=1000.0) then
  tax=income*0.03
else if(income>1000.0.and.income<=5000.0) then
  tax=income*0.10
else if(income>5000.0) then
  tax=income*0.15
else if(income<0.0)  tax=0
end if
case(50:)
if(income>=0.0.and.income<=1000.0) tax=income*0.05
if(income>1000.0.and.income<=5000.0) tax=income*0.07
if(income>5000.0) tax=income*0.10
if(income<0.0)  tax=0
case default
  tax=0
end select

write(*,*) "Tax:"
write(*,*) tax

stop
end

重新给你改正后的代码。尽可能复制粘贴（不截图）

vvt 发表于 2020-6-30 10:31
end case 改为 end select

改了，还是有两个问题
错误        1         error #5082: Syntax error, found IDENTIFIER 'TAX' when expecting one of: THEN       
错误        2        Compilation Aborted (code 1)       

end case 改为 end select