Assume the following main module is in a program that includes the binarysearch function that was shown in this chapter. why doesn't the pseudocode in the main module work?

// this program uses the binarysearch function to search for a
// name in the array. this program assumes the binarysearch
// function has already been defined.

module main()
constant integer size = 5
declare string names[size] = "zack", "james", "pam", "marc", "susan"
declare string searchname
declare integer index
display "enter a name to search for."
input searchname
set index = binarysearch(names, searchname, size)
if index ! = -1 then
display searchname, " was found."
else
display searchname, " was not found."
end if
end module