PLEASE IN C$++$ THIS IS DUE TODAY $($I need the code not an explanation$)$

Given a program that searches for a student$$s ID or name in a text file, complete the FindID$()$ and FindName$()$ functions. Then, insert a try$/$catch statement in main$()$ to catch any exceptions thrown by FindID$()$ or FindName$(),$ and output the exception message. Each line in the text file contains a name and ID separated by a space.

Function FindID$()$ has two parameters: a student's name $($string$)$ and the text file's contents $($ifstream$).$ The function FindID$()$ returns the ID associated with the student's name if the name is in the file, otherwise the function throws a runtime$\_$error with the message "Student ID not found for studentName", where studentName is the name of the student.

Function FindName$()$ has two parameters: a student's ID $($string$)$ and the text file's contents $($ifstream$).$ The function FindName$()$ returns the name associated with the student's ID if the ID is in the file, otherwise the function throws a runtime$\_$error with the message "Student name not found for studentID", where studentID is the ID of the student.

The main program takes three inputs from a user: the name of a text file $($string$),$ the search option for finding the ID or name of a student $($int$),$ and the ID or name of a student $($string$).$ If the search option is $0,$ FindID$()$ is invoked with the student's name as an argument. If the search option is $1,$ FindName$()$ is invoked with the student's ID as an argument. The main program outputs the search result or the caught exception message.

Ex: If the input of the program is:

roster.txt $0$ Reagan

and the contents of roster.txt are:

Reagan rebradshaw$835$ Ryley rbarber$894$ Peyton pstott$885$ Tyrese tmayo$945$ Caius ccharlton$329$

the output of the program is:

rebradshaw$835$

Ex: If the input of the program is:

roster.txt $0$ Mcauley

the program outputs an exception message:

Student ID not found for Mcauley

Ex: If the input of the program is:

roster.txt $1$ rebradshaw$835$

the output of the program is:

Reagan

Ex: If the input of the program is:

roster.txt $1$ mpreston$272$

the program outputs an exception message:

Student name not found for mpreston$272$

I have gotten the first part but can not get student name not found