program prog1 print *, 'Hello, World (1)' print '(A)', 'Hello, World (2)' print '(A8)', 'Hello, World (3)' print '(A)', 'Hello, World' print '(A$)', 'Hello, ' print '(A)', 'World' stop end
program プログラムの名前 プログラムの本体 stop end
という形式になる。
print *, 出力したいものをコンマで区切って並べる
print '(A)', '出力したい文字列'
となる。
program prog2 implicit none real(8):: xvalue print '(A$)', 'Input X: ' read (*, *) xvalue print '("X = ", E15.7)', xvalue stop end
program prog3 implicit none integer:: counter real(8):: xvalue do counter = 1, 5 xvalue = 1./dble(counter) print *, counter, xvalue end do stop end
program prog4 implicit none integer, parameter:: IMAX = 10 integer:: i, isum real(8):: dsum isum = 0 dsum = 0.d0 do i = 1, IMAX isum = isum + i dsum = dsum + dble(i) print *, i, isum, dsum end do print *, 'ISUM = ', isum print *, 'DSUM = ', dsum print *, '1/ISUM = ', 1/isum print *, '1.D0/DSUM = ', 1.d0/dsum stop end
program prog5 implicit none integer, parameter:: IMAX = 10 integer:: i real(8):: r do i = 1, IMAX call random_number(r) print *, i, r end do stop end
program prog6 implicit none integer:: N, M !!! M <- N - 1 integer:: i !!! Counter real(8), dimension(:), allocatable:: r print '(A$)', 'N = ' read (*, *) N print *, 'N = ', N M = N - 1 allocate (r(0:M)) call random_seed() call random_number(r) do i = 0, M print *, i, r(i) end do deallocate (r) stop end
program prog7 implicit none integer:: N, M integer:: i, idummy real(8):: dmini, trial real(8), dimension(:), allocatable:: r read (*, *) N write (*, *) 'Number of Data = ', N M = N - 1 allocate (r(0:M)) do i = 0, M read (*, *) idummy, r(i) end do ! dmini = r(0) do i = 1, M trial = r(i) if (trial <= dmini) then dmini = trial print '(A10$)', 'CHANGED: ' print '(I8, 2E15.7)', i, trial, dmini else print '(A10, I8, 2E15.7)', '', i, trial, dmini end if end do deallocate (r) print *, 'Minimum Value = ', dmini stop end
program prog8 implicit none integer, parameter:: N = 100, M = N - 1 real(8):: a, b, h real(8), dimension(0:M):: x, y, z real(8):: getvalue integer:: i a = 0.d0 b = 1.d0 h = (b - a)/dble(N) do i = 0, M x(i) = a + h*dble(i) call setvalue(x(i), y(i)) z(i) = getvalue(x(i)) end do do i = 0, M print '(3E15.7)', x(i), y(i), z(i) end do stop end subroutine setvalue(xval, yval) implicit none real(8):: xval, yval yval = sin(xval) return end function getvalue(xval) result(yval) implicit none real(8):: xval, yval yval = exp(-xval) return end