폴더안의 txt파일에서 불러와 출력하는데요..
쓰레기값이 들어갑니다...
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<txt파일>
Smith 23 21 20
Carpenter 25 30 20
Stevens 30 25 20
John 15 20 15

-------------------------------------------------------------------------------

#include <iostream>
#include <string>
#include <fstream>

using namespace std;

struct Student
{
       string name;
       int midterm;
       int final;
       int homework;
       int total;
       char grade;
};

void score(Student&, const string, const int, const int, const int);
void print(Student[], const int);

int main()
{
    int countStd;
    ifstream fin;
    fin.open("scores.txt");
    if(fin==NULL)
    cout<<"Error";
    fin>>countStd;

    Student *myStd = new Student[countStd];

    for(int i=0; i<countStd; i++)
    {
            string name;
            int midterm, final, homework;
            fin>>name>>midterm>>final>>homework;
            score(myStd[i], name, midterm, final, homework);
    }

    print(myStd, countStd);
    delete[] myStd;
    return 0;
}

void score(Student& s, const string name, const int s1, const int s2, const int s3)
{
      s.name = name;
      s.midterm = s1;
      s.final = s2;
      s.homework = s3;
      s.total = s1+s2+s3;
      switch((int)s.total / 10)
      {
            case 10: case 9: s.grade='A';
                 break;
            case 8: s.grade='B';
                 break;
            case 7: s.grade='C';
                 break;
            case 6: s.grade='D';
                 break;
            default:
                    s.grade='F';
      }

}

void print(Student s[],const int count)
{
     cout<<"이름\t"<<"\t중간"<<"\t기말"<<"\t과제"<<"\t총점"<<"\t등급\n";
     cout<<"****************************************************************************\n";
     for(int i=0; i<count; i++)
     {
             cout<<s[i].name<<"\t"<<s[i].midterm<<"\t"<<s[i].final<<"\t"<<s[i].homework<<"\t"<<s[i].total<<"\t"<<s[i].grade<<endl;
     }
}