Passing comma separated strings to printf. Discards the second argument, why?

[tdk93]

Why does printf discard all the arguments except one when separated by commas?
For instance the following program gives hello as output.

  printf("hello","world","duh");

[TwilightSpectre]

You are misunderstanding how printf works. You only give it one string, and seperating by commas allows you to format the string, based on specifiers. See http://www.cplusplus.com/reference/cstdio/printf/?kw=printf for details.

Example:

printf("%s %s %s", "hello", "world", "duh");