why this function returns n ?

Question

I have this example :
#include <stdio.h>
#include <cs50.h>
int get_positive_int (void);
int main (void)
{
get_positive_int();
}

int get_positive_int ( void)
{
int n;
do
{
n=get_int("insert positive:");
}
while (n<1);
return n;
}
I still don#t get why this function gives out n ? when the programm is running it doesn't give out integer

Answer 1

Have you declared the get_int function? I can see no user input function here...

Answer 2

yes it is declared in cs50 library.. yes as the example says it doesn't get input..it only gives Output...but why ? since the user should enter an int.