fprint problem in matlab

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Maria
Maria 2020-6-2
评论： Star Strider 2020-6-2
why the outstr value is 24 here ?

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回答（1 个）

Star Strider
Star Strider 2020-6-2
The fprintf fuction returns the number of bytes ouitput to the file.
You probably want sprintf instead here.
  2 个评论
Maria
Maria 2020-6-2
so the value it returns we wouudn't know unless we check somewhere?
Star Strider
Star Strider 2020-6-2
In the code in your image of it (not the actual code, that I had to type in manually), the value is in ‘outstr’. It writes 24 bytes to the file, and the full string to your Command Window (the default output), returning 24 in ‘outstr’.
If you want it to return the actual string to your workspace, use:
outstr = sprintf('The answer is %s', data1);
That works. (I tested it.)

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