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Chaosis13
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 Posted: Sun Jun 15, 2008 3:27 pm Post subject: [HELP][SOLUTION!] C++ File I/O |
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I am a fairly good C++ programmer, but I am a little rusty becuase I took a break. I have done file I/O before, but nothing special... I have recently been trying to make a program that will read the lines of a program then stop when there is a blank line.
Any ideas? I have made the code, compiles fine, then try it but it goes on forever putting blank lines into the command promt window. I made my program see if there was a blank line by useing getline(var), then checking if it has a value, then breaking.
Help!
EDIT:
-SOLUTION-
| Code: | while(!file_io.eof()){
file_io.getline(var);
cout << var << endl;
} |
I used the eof() function, which checks for End Of File oppened. The while statment continues to record the lines until the End Of File is reached.
This is a new statement I found by accident on a website, although i did find it in one of my C++ books later...
Last edited by Chaosis13 on Sun Jun 15, 2008 3:57 pm; edited 1 time in total |
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kitterz
Grandmaster Cheater Supreme
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Joined: 24 Dec 2007
Posts: 1268
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| Posted: Sun Jun 15, 2008 3:55 pm Post subject: |
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Could you be a bit more specific? Why does it keep on putting blank lines?
To answer your question, use this code:
| Code: | if (var == "") {
//Do whatever if it is blank line
}
else {
//Do whatever if it is not a blank line
} |
Please be a bit more specific, as it is not too clear as to what you are trying to accomplish.
And what do you mean by "Reading the lines of a program"?
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Chaosis13
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| Posted: Sun Jun 15, 2008 4:00 pm Post subject: |
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Sorry if I wasn't specific, I was making a program that reads the lines of a file(program), and I had something like your code along with a while statement, but the code wouldn't break for some reason.... I still do not know what happend.
Thank you anyway. (I found solution, above).
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kitterz
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| Posted: Sun Jun 15, 2008 4:03 pm Post subject: |
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You could also use
| Code: | | if (myfile.good()).... |
But im glad u solved your problem!
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