Fortran95程序设计习题答案

第四章 1.program main implicit none write(*,*) "Have a good time." write(*,*) "That's not bad." write(*,*) '"Mary" isn''t my name.' end program 2.program main real, parameter :: PI=3 implicit none.14159 real radius write(*,*) "请输入半径长" read(*,*) radius write(*,"(' 面积='f8. 3)") radius*radius*PI end program 3.program main implicit none real grades write(*,*) "请输入成绩" read(*,*) grades write(*,"(' 调整后成绩为 'f8.3)") SQRT(grades)*10.0 end program 4.integer a,b real ra,rb a=2 b=3 ra=2.0 rb=3.0 write(*,*) b/a ! 输出1, 因为使用整数计算, 小数部分会无条件舍去 write(*,*) rb/ra ! 输出1.5 5.program main implicit none type distance real meter, inch, cm end type type(distance) :: d write(*,*) "请输入长度:" read(*,*) d%meter d%cm = d%meter*100 d%inch = d%cm/2.54 write(*,"(f8.3'米 ='f8.3'厘米 ='f8.3'英寸')") d%meter, d%cm, d%inch end program 第五章 1.program main implicit none integer money real tax write(*,*) "请输入月收入" read(*,*) money if ( money<1000 ) then tax = 0.03 else if ( money<5000) then tax = 0.1 else tax = 0.15 end if write(*,"(' 税金为 'I8)") nint(money*tax) end program 2.program main implicit none integer day character(len=20) :: tv write(*,*) "请输入星期几" read(*,*) day select case(day) case(1,4) tv = "新闻" case(2,5) tv = "电视剧" case(3,6) tv = "卡通" case(7) tv = "电影" case default write(*,*) "错误的输入" stop end select write(*,*) tv end program 3.program main implicit none integer age, money real tax write(*,*) "请输入年龄" read(*,*) age write(*,*) "请输入月收入" read(*,*) money if ( age<50 ) then if ( money<1000 ) then tax = 0.03 else if ( money<5000 )then tax = 0.10 else tax = 0.15 end if else if ( money<1000 ) then tax = 0.5 else if ( money<5000 )then tax = 0.7 else tax = 0.10 end if end if write(*,"(' 税金为 'I8)") nint(money*tax) end program 4.program main implicit none integer year, days logical mod_4, mod_100, mod_400 write(*,*) "请输入年份" read(*,*) year mod_4 = ( MOD(year,4) == 0 ) mod_100 = ( MOD(year,100) == 0 ) mod_400 = ( MOD(year,400) == 0 ) if ( (mod_4 .NEQV. mod_100) .or. mod_400 ) then days = 366 else days = 365 end if write(*,"('这一年有'I3'天')") days stop end program 第六章 1.program main implicit none integer i do i=1,5 write(*,*) "Fortran" end do stop end program 2.program main implicit none integer i,sum sum = 0 do i=1,99,2 sum = sum+i end do write(*,*) sum stop end program 3.program main implicit none integer, parameter :: answer = 45 integer, parameter :: max = 5 integ
er weight, i do i=1,max write(*,*) "请输入体重" read(*,*) weight if ( weight==answer ) exit end do if ( i<=max ) then

write(*,*) "猜对了" else write(*,*) "猜错了" end if stop end program 4.program main implicit none integer, parameter :: max=10 integer i real item real ans ans = 1.0 item = 1.0 do i=2,max item = item/real(i) ans = ans+item end do write(*,*) ans stop end program 5.program main implicit none integer, parameter :: length = 79 character(len=length) :: input, output integer i,j write(*,*) "请输入一个字串" read(*,"(A79)") input j=1 do i=1, len_trim(input) if ( input(i:i) /= ' ' ) then output(j:j)=input(i:i) j=j+1 end if end do write(*,"(A79)") output stop end program 第七章 1.program main implicit none integer, parameter :: max = 10 integer i integer :: a(max) = (/ (2*i, i=1,10) /) integer :: t ! sum()是fortran库函数 write(*,*) real(sum(a))/real(max) stop end program 2.integer a(5,5) ! 5*5=25 integer b(2,3,4) ! 2*3*4=24 integer c(3,4,5,6) ! 3*4*5*6=360 integer d(-5:5) ! 11 integer e(-3:3, -3:3) ! 7*7=49 3.program main implicit none integer, parameter :: max=10 integer f(max) integer i f(1)=0 f(2)=1 do i=3,max f(i)=f(i-1)+f(i-2) end do write(*,"(10I4)") f stop end program 4.program main implicit none integer, parameter :: size=10 integer :: a(size) = (/ 5,3,6,4,8,7,1,9,2,10 /) integer :: i,j integer :: t do i=1, size-1 do j=i+1, size if ( a(i) < a(j) ) then ! a(i)跟a(j)交换 t=a(i) a(i)=a(j) a(j)=t end if end do end do write(*,"(10I4)") a stop end 5.a(2,2) ! 1+(2-1)+(2-1)*(5) = 7 a(3,3) ! 1+(3-1)+(3-1)*(5) = 13 第八章 1.program main implicit none real radius, area write(*,*) "请输入半径长" read(*,*) radius call CircleArea(radius, area) write(*,"(' 面积 = 'F8.3)") area stop end program subroutine CircleArea(radius, area) implicit none real, parameter :: PI=3.14159 real radius, area area = radius*radius*PI return end subroutine 2.program main implicit none real radius real, external :: CircleArea write(*,*) "请输入半径长" read(*,*) radius write(*,"(' 面积 = 'F8.3)") CircleArea(radius) stop end program real function CircleArea(radius) implicit none real, parameter :: PI=3.14159 real radius CircleArea = radius*radius*PI return end function 3.program main implicit none call bar(3) call bar(10) stop end program subroutine bar(length) implicit none integer, intent(in) :: length integer i character(len=79) :: string string=" " do i=1,length string(i:i)='*' end do write(*,"(A79)") string return end subroutine 4.program main implicit none integer, external :: add write(*,*) ad …… 此处隐藏：19255字，全部文档内容请下载后查看。喜欢就下载吧 ……