C Program..help

Answer 1

You're using

#include "glossary_demo.h"

which is basically injecting the contents of glossary_demo.h into your code at compile-time. Your glossary_demo.h file isn't valid C, which is why you're getting all those errors.

It sounds like really you want to load a text file at execution time, which is very different.

Answer 2

You have tagged your question C, but class can be used only in C++, not C.

Your error is from file glossary_demo.h, please show contents of that.

BTW, it must be

#include <stdio.h> (not <stido.h>)