in C++ please Question: Write a program marks.c which consists of a main function and three other functions calledreadmarks (), changemarks (), and writemarks().The program begins by calling the function readmarks() to read the input file marksin.txt whichconsists of a series of lines containing a student ID number (an integer) and a numeric mark (a float).Once the ID numbers and marks have been read into arrays (by readmarks()), the main program asksif the user wants to adjust a mark. If so, the user enters an ID number and the new mark. The mainthen calls the function changemarks() to change the mark associated with the provided student ID.The main then asks the user if they want to adjust another mark, and so on, until the user enters astudent ID of 0. Finally, the main calls the function writemarks() to write the marks out to a filecalled marksout.txt. You may assume that the input file will consist of no more than 20 marks. Indetail, your functions should perform the following;main(): opens the input file marksin.txt and the output file marksout.txt and then callsreadmarks (), passing it the input file pointer, to read the IDs and marks into two arrays. Oncethe arrays have been read, the main then prompts the user to enter a student ID and the revised mark,calls changemark to revise the mark, and repeats until the user enters a student number of 0. Ifchangemarks () cannot find the student ID in the list of possible IDs, the main should print out anerror message, then prompt for the next student ID and revised mark. The user quits revising marks,by entering a student ID of 0. Finally, the main calls writemarks() (passing it the output file pointer)to write out the revised marks.readmarks(): takes a file pointer as an argument and reads the student IDs and marks into arrays idand marks. The function must also return the number of marks read.changemarks (): this function should take 5 values as arguments;1) the number of marks read,2) the ID array,3) the marks arrays,4) the ID number of the student whose mark is to be revised, and5) the revised mark.The functionuld then revise the markthe student with the ID specified in the 4th argument. If thefunction cannot find the specified student ID in the ID array, the function should return 0. Otherwisethe function should change the mark and return 1. (NOTE: if this function returns 0, the main shouldreport "That student is not in the marks list" .)writemarks (); this function should take as arguments a file pointer, the number of marks, the IDarray, and the marks array, and writes the revised marks out to the output file in the same format asthe input file (ID number followed by mark on each line).For marking purposes, change the marks of student IDs 2315 and 2929 to 72 and 66, respectively.Copy and paste your program into the box below.#include #include #define MXN 20 /* maximum number of marks *,int main(void){/* you fill in here */return 0;

#include <stdio.h>#include <stdlib.h># define MAX 20 // maximum number of students in…

Question: Write a program marks.c which consists of a main functi readmarks(), changemarks(), and writemarks(). The program begins by calling the function readmarks () to read consists of a series of lines containing a student ID number (an integ Once the ID numbers and marks have been read into arrays (by reač if the user wants to adjust a mark. If so, the user enters an ID num then calls the function changemarks() to change the mark associa The main then asks the user if they want to adjust another mark, student ID of 0. Finally, the main calls the function writemarks( called marksout.txt. You may assume that the input file will cons detail, your functions should perform the following;

Question: Write a program marks.c which consists of a main functi readmarks(), changemarks(), and writemarks(). The program begins by calling the function readmarks () to read consists of a series of lines containing a student ID number (an integ Once the ID numbers and marks have been read into arrays (by reač if the user wants to adjust a mark. If so, the user enters an ID num then calls the function changemarks() to change the mark associa The main then asks the user if they want to adjust another mark, student ID of 0. Finally, the main calls the function writemarks( called marksout.txt. You may assume that the input file will cons detail, your functions should perform the following;

C++ for Engineers and Scientists

4th Edition

ISBN:9781133187844

Author:Bronson, Gary J.

Publisher:Bronson, Gary J.

Chapter8: I/o Streams And Data Files

Section8.3: Random File Access

Problem 6E

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