1. You are trying to dereference the uninitialized pointers, such as:

cin >> *cppfile;

cin >> *outputfile;

To fix this, change the type of these variables to "std::string" objects and use "std::cin" to directly assign values to them.

2. Change opt from "char*" to a "char" type.
3. Replace the double quotes in the comparison with "opt" to single quotes:

if (opt == "1" || opt == "a" || opt == "A")

to

if (opt == '1' || opt == 'a' || opt == 'A')

4. Include the string library to ensure the program works properly:

#include "string"