Write a recursive function, sumDigits, that takes an integer as a parameter and returns the sum of the digits of the integer.

functions.cpp

#include

using namespace std;

inline void sumDigits(long long& sum, long long num) { // write your recursive sum function here }

main.cpp

#include #include "functions.cpp"

using namespace std;

int main() { long long num = 930567829100185; long long sum = 0;

sumDigits(sum, num);

cout << "The sum of the digits of " << num << " is: " << sum << endl;

return 0; }