The following function should swap the values contained in two integer variables, nom$1$ and num$2.$ What, if anything, is wrong with this function?

void swap $($int num$1,$ int num$2)$

$\{$

int temp $=$ nam$2$;

num$2=$ num$1$;

num$1=$ temp;

$\}$

You must first initialize temp to $0$ before using it$.$

The variable temp should first be set to num$1,$ not num$2.$

The swap function must use reference parameters.

The last line should be temp $=$ num$1.$

Nothing is wrong with this function.