Answer 1

I can explain the logic of how I'd do it and you can convert it into C++
1) make an array of Strings
String arr = {"a", "b", "c"}
2) get a random generated num that goes from 0 to array.length-1
int random = (int) Math.random * array.length-1
3) print or return the value with function
Print:
cout>> arr[random]
Method:
public static String functionName() {
String arr = {"a", "b", "c"};
Int rdm = (int) (Math.random() * arr.length);
return arr[rdm]
4) call the function
functionName();
I did it in java, its heavily commented so you should be able to convert to c++
https://code.sololearn.com/c8H9wqYt9CSk/?ref=app