Question

Write a program that will calculate a student's year marks for all his subjects. The program must read the subject code, the assignment marks for two assignments and the percentage that each assignment contributes towards the year mark, for each subject that the student is registered for.

Create an input file called assignments.dat that contains the following information for a specific student:

The first field in each line represents the subject code, followed by the percentage that assignment 1 contributes towards the year mark and the student's mark (a percentage) for assignment 1. Then follow the percentage that assignment 2 contributes towards the year mark and the student's mark for assignment 2. You should not count the number of entries in the file to determine how many times the file must be read.

Your program must read the file line by line, calculate the student's year mark for the subject as a percentage and write the subject code and the year mark to an output file year mark.dat. If your program works correctly, the output file will look as follows:

Answer 1

#include

#include

using namespace std;

int main()

{

   ifstream inputFile;

   string word;

   inputFile.open("assignment.dat");

   if(!inputFile.is_open())

      {

         cout<<"Failed to read the file.";

      }

   std::ofstream outfile;

   outfile.open("yearmark.dat", std::ofstream::trunc);

   int count = 0;

   string subject;

   int assignment1 = 1, assignment2 =1, temp;

   double percentage;

   while (inputFile >> word)

      {

         if (count == 0) {

            subject = word;

         }

         else if (count > 0 && count < 3) {

            temp = std::stoi(word);

            assignment1 = assignment1*temp;

         }

         else {

            temp = std::stoi(word);

            assignment2 = assignment2*temp;

         }

         count ++;

         if (count == 5) {

            count = 0;

            percentage = (assignment1 + assignment2)/100.0;

            outfile <<subject<<" "<<percentage<<"%"<<endl;

            assignment1 = 1;

            assignment2 = 1;

         }

      }

   

   inputFile.close();

   outfile.close();

   return 0;

}