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Can't pass filestream as function parameter?

Here is my code for an assignment I have. Whenever I try and compile I get an error for my read function due to something in "ios_base.h" I am not sure what to do and/or if my code does the intended function of taking a file and moving it's elements into a separate file that has the name and average next to each other.

#include <iostream>
#include <fstream>
#include <sstream>
#include <iomanip>

using namespace std;

struct Student
{
    string fname;
    string lname;
    double average;
};

int read(ifstream, Student s[]);

void print(ofstream fout, Student s[], int amount);


int main()
{
    const int size = 10;
    ifstream fin;
    ofstream fout;
    string inputFile;
    string outputFile;
    Student s[size];

    cout << "Enter input filename: ";
    cin >> inputFile;
    cout << "Enter output filename: ";
    cin >> outputFile;
    cout << endl;

    fin.open(inputFile.c_str());
    fout.open(outputFile.c_str());

    read(fin , s);
    print(fout, s, read(fin, s));

}

int read(ifstream fin, Student s[])
{
    string line;
    string firstName;
    string lastName;
    double score;
    double total;
    int i=0;
    int totalStudents=0;
    Student stu;

    while(getline(fin, line)){
        istringstream sin;
        sin.str(line);

        while(sin >> firstName >> lastName){
            stu.fname = firstName;
            stu.lname = lastName;

            while(sin >> score){
            total *= score;
            i++;
            }
            stu.average = (total/i);
        }
        s[totalStudents]=stu;
        totalStudents++;
    }
    return totalStudents;
}

void print(ofstream fout, Student s[], int amount)
{
    ostringstream sout;
    for(int i = 0; i<amount; i++)
    {
        sout << left << setw(20) << s[i].lname << ", " << s[i].fname;
        fout << sout << setprecision(2) << fixed << "= " << s[i].average;
    }
}
like image 681
Michael Santoro Avatar asked Aug 02 '26 13:08

Michael Santoro


1 Answers

Stream objects are not copyable. Their copy constructor is deleted. They must be passed by reference, not by value:

int read(ifstream &, Student s[]);

void print(ofstream &fout, Student s[], int amount);

etc...

like image 84
Sam Varshavchik Avatar answered Aug 05 '26 14:08

Sam Varshavchik



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