control break reading in a file

[traviswhiskey]

i am having some trouble getting this program to tally up the number of males and the number of females in each class and then adding them into a total i have been on this for hours now and i'm goin crazy man also the course number changes when i try to cout the course totals for 1301 it displays it as the totals for 1302 even though all the totals are correct for it to be 1301 please someone help

grades >> course >> name >> grade >> sex >> age ;
  courseHold=course;
 
  while(!grades.eof())
  {
   if(course==courseHold)
   {
    cout << endl << course << "\t" << name << "\t" << grade << "\t" << sex << "\t" << age ;
    count++;
    ageSum+=age;
    gradeSum+=grade;
    avgAge=ageSum/count;
    avgGrade=gradeSum/count;
    grades >> course >> name >> grade >> sex >> age ;
   }
    else
   {
    cout << endl << endl << course <<"\t"<< avgGrade <<"\t"<< numMales <<"\t"<< numFemales <<"\t"<< avgAge << endl ;
    avgGrade=gradeSum/count;
    avgAge=ageSum/count;
    grandAge+=ageSum;
    grandGrade+=gradeSum;
    totalCount+=count;
    ageSum=0; gradeSum=0; count=0;
    courseHold=course;
   }
  }
   totalCount+=count;
   grandAge+=ageSum;
   grandGrade+=gradeSum;
   avgAge=ageSum/count;
   avgGrade=gradeSum/count;
   grandAgeAvg=grandAge/totalCount;
   grandAvg=grandGrade/totalCount;
 
   cout << endl << endl << course <<"\t"<< avgGrade <<"\t"<< numMales <<"\t"<< numFemales <<"\t"<< avgAge << endl << endl ;
   cout << endl << endl << "All" << "\t" << grandAvg << "\t" << numMales <<"\t"<< numFemales <<"\t"<< grandAgeAvg << "\t" << endl << endl ;
 
   grades.close();
 
 

and the data file is this

1301 Carol 87 F 21
1301 Bob 82 M 19
1301 Ann 93 F 18
1301 Carl 72 M 23
1302 Pete 87 M 19
1302 Jane 67 F 20
1302 Paul 74 M 18
1302 Cindy 98 F 24
1307 Juan 87 M 24
1307 Fred 61 M 25
1307 Jerry 77 M 30
1307 Carol 90 F 33