Writing an array to a file.

How would you write a 1000 value array to a file?
Right now I am using this:

Code:

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ifstream outFile("file.dat", ios::out);
while(g < 1000){
outFile<<votes[g]<<endl;
g=(g+1); }
outFile.close();

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Does anyone know of a simpler way to do this?

Thanks, August

>Does anyone know of a simpler way to do this?
Dunno about simpler, but shorter.

Code:

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  copy( votes, votes+1000, ostream_iterator< int >(outFile,"\n") );

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Quote:

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Does anyone know of a simpler way to do this?

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First, are you having much success using an ifstream object for output? ;)

A simpler way would be like this:

Code:

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int g=0;
while(g < 1000)
{
        outFile<<votes[g++]<<endl;
}

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However, generally while loops are for looping an indeterminate number of times. For loops are for looping a set number of times:

Code:

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for(int i = 0; i < 1000; i++)
{
   

}

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A faster way would be to assemble the data into a string, and then write to the file once. In addition, in your program you are writing to the file with no spaces between the data, so if your array looks like this:

12, 4, 26, 2, 151

your output file will look like this:

124262151

and I'm wondering how you are ever going to make sense of that data.

Thanks, that is what I wanted to know. :)

Quote:

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Originally Posted by 7stud

and I'm wondering how you are ever going to make sense of that data.

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I would to the same thing but reversed when collecting the data.

Quote:

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Originally Posted by Cool-August

Thanks, that is what I wanted to know. :)


I would to the same thing but reversed when collecting the data.

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It won't work. Try it.

>In addition, in your program you are writing to the file with no spaces between the data
Perhaps you missed the endl. ;)

Quote:

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Originally Posted by swoopy

>In addition, in your program you are writing to the file with no spaces between the data
Perhaps you missed the endl. ;)

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Yep. :(

Sorry for the bad advice Cool-August.

The endl is bad there, though. It causes a flush and thus a disk access after every single number, which is horribly inefficient. Just a space ' ' or a newline '\n' would be better.

Once I made a math game with a high score for the top player.
When you viewed the file it looked like this,

Quote:

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12800august

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There where no newlines of spaces and yet when it read the file it could define the difference bettween the highscore and the player.