I have a char type array[100] with 100 bytes stored in it. I want to write this char type byte array to a file. How could I do this?
I am not writing to a .txt file but some other format.
Thank you.
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1It'll depend on the format. If you just want to copy the array into the file in binary format, ofstream::write would be the obvious choice.Jerry Coffin– Jerry Coffin2012-06-28 17:29:55 +00:00Commented Jun 28, 2012 at 17:29
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3 Answers
Some people object to using <cstdio>, so it is worth mentioning how one might use <fstream>:
{
std::ofstream file("myfile.bin", std::ios::binary);
file.write(data, 100);
}
The four lines above could be combined into this single line:
std::ofstream("myfile.bin", std::ios::binary).write(data, 100);
Comments
No need to get complicated. Just use good old fwrite directly:
FILE* file = fopen( "myfile.bin", "wb" );
fwrite( array, 1, 100, file );
1 Comment
KillianDS
-1: This is inferior to the
ofstream-based answers provided elsewhere in this topic. It is certainly not less complicated and it is not type safe. And it contains an error (you don't close the file).Based on the (little) information you've provided, one possibility would be to write the array to the file in binary format, such as:
std::ofstream out("somefile.bin", std::ios::binary);
out.write(array, sizeof(array));
