$//$what does this program do$?$

#include

#define SIZE $80$

void mystery$1($char $*$s$1,$ const char $*$s$2)$;$//$prototype

int main$($void$)\{$

$$ char string$1[$SIZE$]$; $//$create char array

$$ char string$2[$SIZE$]$; $//$create char array

$$ puts$("$Enter two strings: $")$;

$$ scanf$("\%39$s$\%39$s$",$ string$1,$ string$2)$;

$$ mystery$1($string$1,$ string$2)$;

$$ printf$("\%$s$",$ string$1)$;

$\}$

$//$What doese this function do$?$

void mystery$1($char $*$s$1,$ const char $*$s$2)\{$

$$ while $(*$s$1!=)\{$

$++$s$1$;

$\}$

$$ for$($; $*$s$1==*$s$2$; $++$s$1,++$s$2)\{$

$$ ; $//$empty statement

$\}$

$\}$