C :: Convert Number To Binary From And Base Up To 10

I had an exercise that required me to convert a number to binary (base 2) which as simple enough.

Code:
#include <iostream>#include <iomanip>
#include <cmath>

using namespace std;
void Conversion (int n);
int main () {

[Code] .....

I now have a follow on exercise that requires me to convert to binary from ant base up to 10, i thought this would just be replacing the 2 with a variable obtained form the user, but i am having problems as within the function i am getting an error that i haven't passed enough arguments and i cant see why i get this. I did the following:

Code:
#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
float Conversion (int n, int b);

[Code] ....