Please do as a C++ and find the trace

trace functions int diff (int &a, int b) f 1. int result- a+t 2, result = result-b: 3. return result int calc ( int &a, int b, char c) f 4. int result: 5. if (ca) t 6. result- diff (a. -b: 7. else if (cs)t result- diff (a, b): 9. elset 10, result= 0: 12. 13. 14. 15. if (result