Make a program to compute numeric grades for a course. First make a file and input the course records that will serve as the input. The input file is in exactly the following format:

Each line contains a student's last name, then one space, then the student's first name, then one space, then ten quiz scores all on one line. The quiz scores are whole numbers and are separated by one space. your program will take its input from this file and send its output to a second file.

 

The data in the output file will be the same as the data in the input file except that there will be one additional number (of type double) at the end of each line. This number will be the average of the student's ten quiz scores. Use at least one function that has file streams as all or some of its arguments. 

 

Extend the program to also intake more student scores and correctly format them in the studentScores.txt file and give the user the option of running the program to create the file with the averages and then display the results after saving to the output file.

 

Data:

Mike Bucky 99 95 86 74 100 79 81 93 75 88

Tom Nancy 100 88 74 99 92 83 71 86 94 83

Program Approach -

1. Use the header files as per code requirement.
2. Define the function named average_data() to process the data and compute the average.
3. Declare the variables and initialize them as per code requirement.
4. Read the scores and then compute the average of scores.
5. Define the main function.
6. Open the input file.
7. Check whether the file is opened or not.
8. Call the function named average_data().
9. Display the output.

Step-by-step explanation

Code ( C++ ) -

//header files 

#include <fstream>

#include <iostream>

using namespace std;

//defining function named average_data to process the data

//and compute the average of scores

void average_data(ifstream &infile, ofstream &outfile) {

  //variables declaration and initialization

  string first_name, last_name;

  int quiz_score;

  double avrg = 0.0;

  //while loop begins

  while (!infile.eof()) {

    //for reading the names of student 

    infile >> last_name >> first_name;  

    ////for displaying the names of student in output file

    outfile << last_name << " " << first_name << " ";

    avrg = 0.0;

    //for reading scores of student

    for (int k = 0; k < 10; k++) {

      infile >> quiz_score;

      outfile << quiz_score << " ";

      avrg += quiz_score;

    }

    ///computing the average 

    avrg /= 10;

    //displaying the average of each students scores

    outfile << avrg << "\n";

  }

}

//main function definition

int main() {

  //opening the input file 

  ifstream infile("studentScores.txt");  

  //checking whether the file is opened or not

  if (!infile) {   

    //if not then display the error message

    cout << "Error: No such file found\n";

    return 1;

  }

  //opening the output file

  ofstream outfile("output.txt"); // Open output file

  //calling the function named average_data()

  average_data(infile, outfile);   

  //closing the input file

  infile.close();   

  //closing the output file

  outfile.close();         

  return 0;

}

Sample input

Sample output

Please see the attached file for the complete solution