Thread: error C2275

I'm getting this error on line 33: error C2275: 'std::ifstream' : illegal use of this type as an expression

I probably have some other issues too but I think I'm pretty close to finishing. Thanks for any help.

Here is what I have so far:

Code:

#include <iostream>
#include <iomanip>
#include <cmath>
#include <fstream>
#include <string>

using namespace std;

int openFile(ifstream &rss, string file, string grades);
void displayHeader();
void readStuData(ifstream &rss, int scores[], int id[], int &count, bool &tooMany);
float getAverage(int scores[], int count);
void assignGrade(int oneScore, float average);
void reportResults(int id[], int scores[], int count);

const int MAX_SIZE = 10; 

int main()
{
        ifstream rss;
        string file; 
        string grades;
        int scores[MAX_SIZE];
        int id[MAX_SIZE];
        int i , count = 0, oneScore = 0;
        float avg = 0, average = 0;
        bool tooMany;

       
        cout << "Enter filename: ";
        cin >> file;
        
        openFile(ifstream &rss,file,grades);
        displayHeader();
        readStuData(rss,scores,id,count,tooMany);
        getAverage(scores,count);
        assignGrade(oneScore,average);
        reportResults(id,scores,count);

        if (tooMany = true)
        {
                cout << "Average score is: " << getAverage(scores,count) << "%" << endl;
                cout << "The array is filled. Remaining scores will not be stored.";
                cout << endl;
        }
        else 
                reportResults(id,scores,count);
}
void reportResults(int id[], int scores[], int count)
{
        int i;
        int oneScore;
        float average;
        string grades;

        for (int i = 0; i < MAX_SIZE; i++)
        {       
                assignGrade(oneScore,average);
                cout << id[i] << setw(17) << scores[i] << setw(17) << grades << endl;
        }
}

void assignGrade(int oneScore, float average)
{
        string grades, file;
        ifstream rss;
        int scores[MAX_SIZE];

        rss >> scores[oneScore];
        oneScore = 0;
        while (!rss.eof() && oneScore < MAX_SIZE)
        { 
                if (oneScore > average + 10)
                {
                        grades = "OUTSTANDING"; 
                }
                else if (oneScore < average - 10)
                        {
                                grades = "UNSATISFACTORY";
                        }
                        else
                        {
                                grades = "SATISFACTORY";
                        }       
                oneScore++;
                rss >> scores[oneScore];
        }
}

float getAverage(int scores[], int count)
{
        int id[MAX_SIZE];
        int sum = 0;
        float average;
        int i;

        for(int i = 0; i < MAX_SIZE; i++)
        {
                sum += scores[i];
                count++;
        }
        average = sum / MAX_SIZE;
        return average;
}

void displayHeader()
{
        //Output header
        cout << "\nStudent ID" << setw(13) << "Scores" << setw(13) << "Grades"<< endl;
}

void readStuData(ifstream &rss, int scores[], int id[], int &count, bool &tooMany)
{
        int tempID;
        int tempScore;

        //Get input
        rss >> tempID >> tempScore;
        while(!rss.eof() && (count < MAX_SIZE))
        {
                id[count] = tempID;
                scores[count] = tempScore;
                count++;
                rss >> tempID >> tempScore;

                if (count > MAX_SIZE)
                {
                        tooMany = true;
                }
                else 
                        tooMany = false;
        }
}

int openFile(ifstream &rss, string file)
{
        rss.open(file.c_str());
        if (rss.fail())
        {
      cerr << "ERROR: Cannot open file for input." << endl;
      return EXIT_FAILURE;      
        }
}

Ok, I did that and now I get

fatal error LNK1120: 1 unresolved externals

&

error LNK2019: unresolved external symbol

Compare

Code:

int openFile(ifstream &rss, string file, string grades);

and

Code:

int openFile(ifstream &rss, string file)