I have a program that scans a text file and finds strings in a certain column that look like numbers, ie 100.3, it grabs these strings and prints them out.Now I want to use the same routine, but once the character string is found, ie 100.3, I would like to assign it ...
如果例程调用带有霍尔瑞斯常量的子程序,并且调用的子程序要求参数为 INTEGER(或除 CHARACTER 以外的任意类型),请使用 -xhasc=no 编译例程。 示例: demo% cat hasc.f call z(4habcd, ’abcdefg’) end subroutine z(i, s) integer i character *(*) s print *, "string length = ", len(s) return ...
program where_construct1 implicit none integer, parameter :: N = 5 character(len=100) :: outFormat integer :: i, j real :: a(N,N) = 0, b(N,N) = 0, threshold = 0.5, & c(N,N) = 0, d(N,N) = 0 ! used in next examples ! write some values in a call random_number(...
PROGRAM test_allocatable—arrays IMPLICIT NONE !声明数据 REAL,DIMENSION(:),ALLOCATABLE:: arrl REAL,...
Require all variables to be explicitly declared !这个一般都是要写上的。下面会进一步说明。implicitnoneinteger:: ierrcharacter:: ynreal:: radius, height, areareal,parameter:: pi =3.1415926536!这是常量的声明方法interactive_loop:do!do循环,Fortran中的循环可以加标签,如d前面的!interactive_loop就是标签!
REAL语句是类型声明语句,它声明实型数据类型的变量。这条语句重载Fortran中指定的默认类型。 CHARACTER语句 !格式 CHARACTER(len=<len>):: variable_name1 [,variable_name2,... ] CHARACTER(<len>) : : variable_name1 [,variable_name2,... ] CHARACTER:: variable—name1 [,variable_name2,... ] !
character(len=100) :: filename print *, 'Enter the name of the file to write:' read *, filename print *, 'Enter the number of data points:' read *, n ! 初始化数据 do i = 1, n data(i) = real(i) * 1.1 end do open(unit=20, file=filename, status='unknown', action='wr...
character(len=50) :: file_name real :: data(5) ! 文件名 file_name = 'formatted_data.txt' unit_num = 20 ! 写入文件 open(unit=unit_num, file=file_name, status='replace') do i = 1, 5 write(unit_num, '(f8.2)') i * 1.0 ...
real x / 1.0 /, y / 0.0 / print *, x/y end character string*5, out*20 double precision value external exception_handler i = ieee_handler(’set’, ’all’, exception_handler) string = ’1e310’ print *, ’Input string ’, string, ’ becomes: ’, value print *, ’Value of 1...
Fortran语法中的变量相当于函数上变量,但其种类则更多,举凡复数(complex)、整数(integer)、实数(real)、逻辑(logical)和字符串(character)等等。对于变量的规定是变量的第一个字母为英文字母,其长度最长为6个字,除刚刚说的第一个字之外,其余的可为数字或字母,以下为几个简单范例:Integer count,pg1 ...