how to initialize the object in constructor in c 2b 2b

1BigMommaClass {
2    BigMommaClass(int, int);
3
4private:
5    ThingOne thingOne;
6    ThingTwo thingTwo;
7};
8
9BigMommaClass::BigMommaClass(int numba1, int numba2): thingOne(numba1 + numba2), thingTwo(numba1, numba2) {
10// Code here
11}