error: ‘strcpy_s’ was not declared in this scope; did you mean ‘strcpy’?

This error message occurs when the `strcpy_s` function is not recognized by the compiler. `strcpy_s` is a secure version of the `strcpy` function, which helps to prevent buffer overflow errors.

To fix this error, you need to include the appropriate header file. On Windows, the `strcpy_s` function is defined in the `string.h` header file. You can add the following line to the top of your code to include this header file:

#include <string.h>

Alternatively, you can replace the `strcpy_s` function with the standard `strcpy` function, which is defined in the `string.h` header file as well. However, note that the `strcpy` function is not as secure as `strcpy_s`, and may lead to buffer overflow errors if used incorrectly.