Do this in logical pieces.
First, write a function that has arguments for your employee data and this function puts the data into an array.
Make the array very simple, like no more than 3 elements.
Second write a function that has arguments for your employee data and this function will display the data.
Third, write your main() where the user enters employee data. After ine emoloyee is entered, call your first function t put the data into the array. When all the employee data is entered, enter a loop where yu cal your second function to display the data.
Make sure this much works.
Then replace the inside of your first function to use a disc file instead of an array. Change your main() to open the file at the beginning and close it at the end.
Unless you write the code yourself you will never learn how to do it. I can help you if you get stuck but I cannot just do your work for you.