C++ language

Write a function, findLast, that has two non-negative integer parameters, where the first parameter is a number and the second parameter is a digit, and that returns the position of the last appearance of the second parameter in the first parameter. If the second parameter does not appear in the first parameter then the function returns -1.

For exaple if the following statement appears in the main function,

int A = 123413;

int B = findLast(A, 1);

cout << B << endl;

then the output is 4