cout << function(); undefined reference. issues with a function

Question

#include <iostream>
using namespace std; 

//defining function
double distance(double,double);
int main() {
  
    //where im having issues i think
    cout << distance();

    return 0; 
}
//attempting to start the function with rate*time=distance and returning the value
double distance(double rate, double time)
{
    time = 10; 
    rate = 10; 
    return time*rate; 
}

main.cpp:9:11: error: no matching function for call to 'distance'
  cout << distance();
          ^~~~~~~~
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/bits/stl_iterator_base_funcs.h:138:5: note: 
      candidate function template not viable: requires 2 arguments, but 0
      were provided
    distance(_InputIterator __first, _InputIterator __last)
    ^
main.cpp:5:8: note: candidate function not viable: requires 2 arguments,
      but 0 were provided
double distance(double,double);
       ^
1 error generated.
compiler exit status 1

This is what I got when I attempted to run it through. I understand this is pretty rudimentary but I'd like to have an understanding of what I did wrong before I continue

Answer 1

At least pass the parameters when you are calling the function since your function needs to params