Why do we need to use function prototypes in our programs? Identify the prototype, header, and body in the following code sample:

void printTheValues$($vector$)$;

void printTheValues$($vector dataValues$)\{$

for $($auto value : dataValues$)\{$

std::cout $<<$ value $<<""$ ;

$\}$

std::cout $<<$ std::endl;

$\}$