Write C++ Program that does the following: •Instead of reading data from the user, I will give you a file, grades.txt (look in ~cthorpe/public/141) •The format of the file is: –First line: number of records –Subsequent lines: Last name on a line by itself First name and three homework grades •Read function: parameters are –An instream, passed by reference, from which to read the data –Fields for firstname, lastname, grade1, grade2, grade 3 •The read function should read in the data from the instream. It is a void function •What types are the parameters? How will you pass them? •Write function: parameters are –Firstname, lastname, grade1, grade2, grade3, average grade, letter grade –What types are those parameters? Do you need to pass them by reference? •The write function will write the data to the screen formatted neatly –Which formatting instructions will you need to use? Overall program flow: •Open the file in the main program. •Read in the number of records •For each record, –Call the read function –Calculate the average score and letter grade –Call the write function –Update the running total of the average grades •At the end, close the file and output the overall average score.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Write C++ Program that does the following:

•Instead of reading data from the user, I will give you a file, grades.txt (look in ~cthorpe/public/141)

•The format of the file is:

–First line: number of records

–Subsequent lines:

Last name on a line by itself

First name and three homework grades

•Read function: parameters are

–An instream, passed by reference, from which to read the data

–Fields for firstname, lastname, grade1, grade2, grade 3

•The read function should read in the data from the instream. It is a void function

•What types are the parameters? How will you pass them?

•Write function: parameters are

–Firstname, lastname, grade1, grade2, grade3, average grade, letter grade

–What types are those parameters? Do you need to pass them by reference?

•The write function will write the data to the screen formatted neatly

–Which formatting instructions will you need to use?

Overall program flow:

•Open the file in the main program.

•Read in the number of records

•For each record,

–Call the read function

–Calculate the average score and letter grade

–Call the write function

–Update the running total of the average grades

•At the end, close the file and output the overall average score.

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I created a nano myfile.txt for the input file and it still doesn't work but you can see here that it is in the same directory at the very end and I am still getting the same issue. Any chance you could still help me with this?

[rainvifr@polaris:~]$ ls
advice.txt goals.txt Gradebook1.cpp Gradebook3.cpp Grades.txt HW1.cpp HW2.cpp HW2.cpp.save.1 lab1 #lab2.cpp# lab3.cpp lab4.cpp lab5.cpp lab6.cpp lab7.cpp lab8.cpp public_html
cs141 Gradebook1 Gradebook3 grades.txt HW1 HW2 HW2.cpp.save HW2.cpp.save.2 lab1.txt lab3 lab4 lab5 lab6 lab7 lab8 myfile.txt
[rainvifr@polaris:~]$ g++ Gradebook.cpp -o Gradebook3
g++: error: Gradebook.cpp: No such file or directory
g++: fatal error: no input files
compilation terminated.

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Follow-up Question

Im having trouble with calling in the file. Everytime I try and run the code it says fatal error: no input files and I was wondering how I would fix that?

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