Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Open a file Programmatically in Fortran.

Posted on 2006-11-01
5
326 Views
Last Modified: 2013-11-08
I want a small code in Fortran that opens a .txt file when executed. I have Lahey90 V4.5 to compile this program.

Thank you.
0
Comment
Question by:Aiysha
  • 2
5 Comments
 
LVL 11

Expert Comment

by:cup
ID: 17853927
You didn't say whether you wanted to read from it or to write to it.

To open a file for reading on channel nnnn

open (nnnn, 'afile.txt', status='old')

To open for writing

open (nnnn, 'afile.txt', status='new')
0
 

Author Comment

by:Aiysha
ID: 17853979
cup,
I might be asking for too much, but can you please send me a entire program, so I can just compile it..I am very new to fortran..

Thank you.
0
 
LVL 11

Accepted Solution

by:
cup earned 500 total points
ID: 17872978
Sure

program main
    ! SRC is the input channel
    ! DST is the output channel
    integer SRC, DST
    parameter (SRC = 20, DST = 30)  ! any number will do
    integer i, isq

    ! Output a table of squares
    ! use unknown so you can run the program over and  over again
    open (DST, file='squares.txt', status='unknown')
    do i = 1, 10, 1
       isq = i * i
       write (DST, '(I2, I4)') i, isq
    end do
    close (DST)

    ! Read the file and print it
    open (SRC, file='squares.txt', status='old')
    do while (.true.)
       read (SRC, '(I2, I4)', end = 100) i, isq
       print *, i, isq
    end do
!   end of file reached
100 continue
    close (SRC)
    stop
end program
0

Featured Post

Networking for the Cloud Era

Join Microsoft and Riverbed for a discussion and demonstration of enhancements to SteelConnect:
-One-click orchestration and cloud connectivity in Azure environments
-Tight integration of SD-WAN and WAN optimization capabilities
-Scalability and resiliency equal to a data center

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Navigation is an important part of web design from a usability perspective. But it is often a pain when it comes to a developer’s perspective. By navigation, it often means menuing. This is less theory and more practical of how to get a specific gro…
When we want to run, execute or repeat a statement multiple times, a loop is necessary. This article covers the two types of loops in Python: the while loop and the for loop.
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.
The viewer will be introduced to the technique of using vectors in C++. The video will cover how to define a vector, store values in the vector and retrieve data from the values stored in the vector.

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question