We help IT Professionals succeed at work.

Read a TXT file into an array in C++

1,134 Views
Last Modified: 2013-12-19
I want to read the attached txt file into an array using C++. The array will look exactly the same as the input file. Should print on the screen.
A8.txt
Comment
Watch Question

you can
1)use ifstream to read each into string;
2)split string into two parts
3)convert them into double(float)
4)create a pair object to store those two number
5)insert  into a vector container
I cannot give you the code though.

Author

Commented:
Thank you but that doesn't help as I  have no experience writing a C++ code.
I was told not to paste codes.
something like:
ifstream ifs("your.file")
//container
vector<pair<double, double>> array;
while(!ifs.eof())
{
    string line;
    getline(ifs, line);
     //split line into two substring(using sub_str())
     //make_pair
     array.push()
}
good luck.

Commented:
Since you're using Visual C++, not Native, you can just use the Managed classes. I'm guessing you want each line in the file to be read  into an index of an array? If so, consider this code. I hope it's what you're looking for; if not, let me know.
static System.String[] ReadFile(System.String myFile)
{
     return System.IO.File.ReadAllLines(myFile);
}
 
static void DisplayFileContents(System.String[] myFileContents)
{
     foreach(System.String line in myFileContents)
     {
          System.Console.WriteLine(line);
     }
}

Open in new window

Commented:
Whoops, sorry, that's C# syntax. Consider the following, instead, heh...
static cli::array<System::String^>^ ReadFile(System::String^ myFile)
{
     return System::IO::File::ReadAllLines(myFile);
}
 
static void DisplayFileContents(cli::array<System::String^>^ myFileContents)
{
     for each(System::String^ line in myFileContents)
     {
          System::Console::WriteLine(line);
     }
}

Open in new window

Author

Commented:
It didn't really help solve my problem....
This one is on us!
(Get your first solution completely free - no credit card required)
UNLOCK SOLUTION

Gain unlimited access to on-demand training courses with an Experts Exchange subscription.

Get Access
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Empower Your Career
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Unlock the solution to this question.
Join our community and discover your potential

Experts Exchange is the only place where you can interact directly with leading experts in the technology field. Become a member today and access the collective knowledge of thousands of technology experts.

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.