question on program using functions and arrays

[gdarian216]

I am reading in different names and scores from a file. I have created a struct that is made up of arrays and a string. Im tring to but the string and scores in the correct array by using a function. I am having trouble and im stuck if anyone can provide some insight I would appreciate it.

this is what i have so far.....

#include <iostream>
#include <string>
#include <vector>
#include <fstream>
using namespace std;
 
 
//structure that holds student record information.
struct records
{
        string name;
        float quizzes[7];
        float projects[6];
        float exams[2];
        float labs[14];
};
 
const int num_quiz = 7;
const int num_exams = 2;
const int num_projects = 6;
const int num_labs = 14;
 
 
const int quiz_pts = 70;
const int exam_pts = 200;
const int projects_pts = 300;
const int lab_pts = 150;
 
get_scores(string name, int num_scores);
 
int main()
{
        // Ask the user for a file name
        cout << "Enter a file name: ";
        string file;
        cin >> file;
        cout << file;
 
        int counter = 1;
        ifstream in_file;
 
        record grades;
        // Define a file input stream and open the file
        in_file.open("file.txt"); //opening file
 
        if (in_file.fail())
        {
        // Failed to open the file (file doesn't exist or isn't readable)
        cout << "Could not open file: " << file  << "\n";
        exit(1);
        }
 
 
        float quiz_ave = 0.0;
        float exam_ave = 0.0;
        float project_ave = 0.0;
        float lab_ave = 0.0;
 
        // Repeatedly get characters from the file
 
 
        get_scores(num_quiz);   //function for inputing info in struct.
 
        get_scores(num_projects);
 
        get_scores(num_exams);
 
        get_scores(num_labs);
 
    // Close the file
    in_file.close();
 
 
    return 0;
}
 
//function that takes in parameters to input scores in array
get_scores(int num_scores)
{
        int index = 0;
        in_file >> student.name;
 
        for (int i = 0; i < num_scores; i++)
        {
         in_file >> student.quizes[i];
        float quiz_ave += student.quizes[i];
        }
 
}

thanks

[tuvok90]

I am reading in different names and scores from a file. I have created a struct that is made up of arrays and a string. Im tring to but the string and scores in the correct array by using a function. I am having trouble and im stuck if anyone can provide some insight I would appreciate it.

this is what i have so far.....

thanks

Here are some observations to help you debug your program:

Function prototypes must match the actual function signature. Take a look at your prototype for get_scores and then look at the actual function signature.

Your in_file variable is not in the proper "scope" to be used in get_scores function. It's declared in main so it is only visible within main.

The input stream in_file is extracting "strings" from the input. You must convert the input to the proper data type (in this case "float") before you can do arithmetic operations on the data.

It looks like you want to store your data into a variable of type "struct records" named "student". student isn't declared anywhere. Here is an example of creating struct variables:
struct records {
int age;
} myRecord; // myRecord1, myRecord2, myRecord3; declares 3 records
myRecord.age = 20; // now I can do something with myRecord

You could also create a variable this way:
struct records myRecord;

These are just technical observations. These might help your program to compile, but they won't fix any logical errors. It looks to me like your algorithm won't work as you might expect. I can't write the program for you, else you won't learn. But I will suggest the following:

Think about how your input file is laid out. If you haven't already, try writing your algorithm out on paper (pseudocode) and step through your code by hand - (pretend you are the computer). Don't worry about the implementation details at first, just get a high level algorithm and then refine it - aka "top down stepwise refinement". Assuming this is a school project - don't be afraid to ask your teacher or TA for help if you get stuck.


Here are some online C++ tutorials:
http://www.cprogramming.com/tutorial.html

Finally, here is a link to some awesome online C++ books, these books are a bit heavy for beginners, I'd suggest going through the tutorials first and/or get through an introductory book first.
http://www.mindview.net/Books/TICPP/...ngInCPP2e.html

I hope my suggestions help. Good Luck:)