gistfile1.txt

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

const int 	MAX_LEN = 20;
const int 	NUM_SCORES = 3;
struct Students {
	int 	sid;
	char 	sname[MAX_LEN];
	double 	scores[NUM_SCORES];
	double  total_score;
};

Students *makeStudents(int);
void printStudents(Students * const, int);


int main()
{
	const int N = 10;
	//Students *ptr;

	fstream f;
    // Students new_students[N];
	Students *sptr = new Students [10];


    f.open("students.bin", ios::in | ios::binary);

	if (f.is_open())
    {
		for ( int i =0; i<N; i++) {
			f.read((char *)sptr+i, sizeof(Students));
			cout << (sptr+i)->sid << endl;
			cout << (sptr+i)->sname << endl;
			cout << "Scores: " << endl;
			(sptr+i)->total_score = 0;
			for(int j = 0; j < NUM_SCORES; j++){
				cout << (sptr+i)->scores[j] << endl;
				(sptr+i)->total_score += (sptr+i)->scores[j];
			}
				cout << "Total Score: " << (sptr+i)->total_score << endl;
		}

        // f.read(reinterpret_cast<char*>(new_students), N * sizeof(Students));
        f.close();
    }
    else{
        cout << "Error opening binary file.\n" << endl;
    }

    
    // cout << sizeof(new_students[1]);
    
    

    for (int i = 0; i < N-1; i++)
    {
		if((sptr->total_score)/3 >= 50){
			cout << (sptr+i)->sid << endl;
			cout << (sptr+i)->sname << endl;
			for (int j = 0; j < N; j++)
			{
				cout << (sptr+i)->scores[j] << endl;
			}
			cout << (sptr+i)->total_score << endl;
		}
    }


	//printStudents(ptr, N);



}



void printStudents(Students * const ptr, int N)
{
    double temp_total;
for(int i=0; i < N; i++)
	{
		cout << "ID: " << (ptr+i)->sid << endl;
		cout << "Name: " << (ptr+i)->sname << endl;
		cout << "Scores: " << endl;
		for(int j = 0; j < NUM_SCORES; j++){
            cout << (ptr+i)->scores[j] << endl;
            temp_total += (ptr+i)->scores[j];
		}
            cout << "Total Score: " << endl;
            cout << temp_total << endl;
            (ptr+i)->total_score = temp_total;
            temp_total = 0;
            cout << endl;
	}
}