Maximum size of string can be printed using %s?

问题:

What is the maximum size which can be printed using %s in c language.

I was trying to print a buffer in file using fprintf but at a point I felt that it was going more to 320KB . And fprintf was writing truncated string to the file . Is there any limit with %s ?

回答1:

printf() has an upper limit. It will successfully handle up to N chars. N is at least 4095.

The number of characters that can be produced by any single conversion shall be at least 4095. C11dr §7.21.6.1 15

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[Edit]

With such a large (320 kB) expected output, if possible, consider using fputs(s, stream) rather than fprintf(stream, "%s", s); which does not have this 4095 limitation.

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