Comment by shakna

displayln is a _Generic.

All of these are valid:

    displayln("Hello, World!");
    displayln(100);
    displayln(1.8);

The point is, for simple things, to not have to specify how they appear.

> Well... Because it should have been

> printf("Hello, World!\n");

No. You don't really want to do that. If you're doing that, use puts [0] . All this requires is a modification to one string in memory and you have an injection vulnerability.

[0] http://www.cplusplus.com/reference/cstdio/puts/