Write a C++ function named getDistinctChars that takes a C-string argument and returns a C-string containing the distinct characters in the C-string argument. For example, if the C-string argument is "massachussettes", then your function must return the C-string "maschuet". Hint:- Use your function countDistinctChars function.

Can you help me solve this problem? Please, do not use any defined function in the C++ library to solve as I have not explored. Use write normal functions to solve. Thank you so much.