i need help with this program. in basic c languge and it simple to understand it .

i need to includes array , function ,and string

Write a C program to make a schedule Main Menu: 1- New User 2- Existing User Enter the user name: User You will create a file with the name of that user and save it(User.txt) If the file exists, you should show a message showing that the file already exists Enter the user name: User You will open the file of that user and display the Operations Menu If the file doesn't exist, you should show an error message (the file doesn't exist" exit the program and Operations Menu 1-Show Schedule 2- Add event 3- Remove event 4- Show events 5- Exit Date: 11-3-2018 Event 1: Meeting Event 2: Study Date: 11-3-2018 Event 1: Trip Event 2: dinner Print the whole schedule to the user .Then go back to previous menu Enter the date by tying day then month then year: 11 3 2018 Enter the event name: xam 2. .Prompt the user to input the date of the event . Then prompt the user to input the name of the event. . Then append it to the user file . Then return to the previous menu Enter the date by tying day then month then year: 11 3 2018 Enter the event name: xam .Prompt the user for the event date Then Prompt for the name Write a C program to make a schedule Main Menu: 1- New User 2- Existing User Enter the user name: User You will create a file with the name of that user and save it(User.txt) If the file exists, you should show a message showing that the file already exists Enter the user name: User You will open the file of that user and display the Operations Menu If the file doesn't exist, you should show an error message (the file doesn't exist" exit the program and Operations Menu 1-Show Schedule 2- Add event 3- Remove event 4- Show events 5- Exit Date: 11-3-2018 Event 1: Meeting Event 2: Study Date: 11-3-2018 Event 1: Trip Event 2: dinner Print the whole schedule to the user .Then go back to previous menu Enter the date by tying day then month then year: 11 3 2018 Enter the event name: xam 2. .Prompt the user to input the date of the event . Then prompt the user to input the name of the event. . Then append it to the user file . Then return to the previous menu Enter the date by tying day then month then year: 11 3 2018 Enter the event name: xam .Prompt the user for the event date Then Prompt for the name