如何在printf（）中使用多种精度？

Question

Looking at the information under the heading " Precision can be omitted or be any of: ".

The example: printf("%.*s", 3, "abcdef"); works, outputting: abc (truncating the rest of the string.)

Now, I would like to have a string with multiple parameters formatted (truncated):

printf("%.*s, %.*s", 3, 3, "abcdef", "xyz123");

but the program crashes.

What is the correct syntax?

Thank You.

Answer 1

Maybe you should change order?

printf("%.*s, %.*s", 3, "abcdef", 3, "xyz123");

By the way you can hardcode precision if you don't need it as a variable:

printf("%.3s, %.3s", "abcdef", "xyz123");

(Stephen Canon kindly corrected the typo)

Answer 2

You want to do it like this:

printf("%.*s, %.*s", 3, "abcdef", 3, "xyz123");

The format arguments should be in the same order as the format specifiers.

Answer 3

printf("%.*s, %.*s",3,"abcdef",3,"xyz123");