Array of struct help

Im having trouble figuring out how to take a previously done program and converting the entire thing int an array of structure. Any hints and clues that can help me out will be much appreciated.

# include <fstream>
# include <iomanip>
# include <string>
# include <cmath>
# include <cctype>

using namespace std;

const int STUIDMIN = 1111;
const int STUIDMAX = 9999;
const int EXAMMIN = 0;
const int EXAMMAX = 100;
const int MAXA = 100;
const int MINA = 90;
const int MAXB = 89;
const int MINB = 80;
const int MAXC = 79;
const int MINC = 70;
const int MAXD = 69;
const int MIND = 60;
const int MAXF = 59;
const int MINF= 0;
const char SEXF = 'F';
const char SEXM = 'M';
const int MAX_SIZE = 10;
enum gradeType {A,B,C,D,F};

struct ExamData
{
	float e1;
	float e2;
	float e3;
	int examAvg;
	int totA;
	int totB;
	int totC;
	int totD;
	int totF;
	float highest;
	float lowest;
	gradeType stuGrade;
};

struct StuData
{
	string name;
	int id;
	char sex;
	int totFe;
	int totMa;
	float perFe;
	float perMa;
	ExamData exams;
};
StuData student;

void printHead(ofstream&);

char sexUpper(StuData);
void printData(ofstream&, StuData);
bool validData(StuData);
int avg(StuData);
gradeType grade(StuData&);
int sexCount(StuData&);
void examHighLow(StuData&);
void printAvgAndGrade(ofstream&,StuData);
void printInvalidData(ofstream&);
void printNoValidData(ofstream&);
void printStat(ofstream&, StuData);

int main()
{
  ifstream inFile;
  ofstream outFile;

  inFile.open("in.data");
  outFile.open("out.data");

  if(outFile.fail() || inFile.fail())
   {
    outFile << "Files have failed, check for errors." << endl;
    return 1;
   }

  outFile.setf(ios::fixed);
  outFile.setf(ios::showpoint);
  outFile.precision(2);

  printHead(outFile);

  student.exams.totA = 0;
  student.exams.totB = 0;
  student.exams.totC = 0;
  student.exams.totD = 0;
  student.exams.totF = 0;
  student.exams.highest = -1;
  student.exams.lowest = -1;
  student.totMa = 0;
  student.totFe = 0;
  student.perFe = 0;
  student.perMa = 0;

  inFile >> student.name >> student.id >> student.sex >> student.exams.e1 >> student.exams.e2 >> student.exams.e3;

  while (inFile)
  {
    student.sex = sexUpper(student);

    printData(outFile, student);

    if (validData(student))
    {

      student.exams.examAvg = avg(student);

      student.exams.stuGrade = grade(student);

      sexCount(student);

      examHighLow(student);

      printAvgAndGrade(outFile, student);
    }

    else
      printInvalidData(outFile);

    inFile >> student.name >> student.id >> student.sex >> student.exams.e1 >> student.exams.e2 >> student.exams.e3;
  }

  if(student.exams.highest + student.exams.lowest == -2)

    printNoValidData(outFile);


  else
    printStat(outFile, student);

  inFile.close();
  outFile.close();

  return 0;
}

 void printHead(ofstream& outFile)
 {
   outFile << "~~Stud Exam Report~~" << endl;
   outFile << left << setw(15) << "Name" << setw(15) << "Stud ID" << setw(10) << "Sex"
           << setw(10) << "Exam 1" << setw(10) << "Exam 2" << setw(10) << "Exam 3"
           << setw(15) << "Avg of Exams" << setw(10) << "Grade" << endl;
   outFile << left << setw(15) << "----" << setw(15) << "-------" << setw(10) << "---"
           << setw(10) << "------" << setw(10) << "------" << setw(10) << "------"
           << setw(15) << "------------" << setw(10) << "-----" << endl;
 }

 char sexUpper(StuData student)
 {
   return toupper(student.sex);
 }

 void printData(ofstream& outFile, StuData student)
 {
    outFile << left << setw(15) << student.name << setw(15) << student.id << setw(10) << student.sex
            << setw(10) << student.exams.e1 << setw(10) << student.exams.e2 << setw(10) << student.exams.e3;
 }

 bool validData(StuData student)
 {
   if((student.id >= STUIDMIN && student.id <= STUIDMAX)&& (student.sex == SEXF || student.sex == SEXM) &&
      (student.exams.e1 >= EXAMMIN && student.exams.e1 <= EXAMMAX) &&  (student.exams.e2 >= EXAMMIN && student.exams.e2 <= EXAMMAX) &&
      (student.exams.e3 >= EXAMMIN && student.exams.e3 <= EXAMMAX))

     return true;

   else
     return false;
 }

 int avg(StuData student)
 {
   return ceil((student.exams.e1 + student.exams.e2 + student.exams.e3)/3);
 }

 gradeType grade(StuData& student)
 {
   switch (student.exams.examAvg)
   {
      case 90 ... 100:
      {
        student.exams.totA++;
        return A;
	break;
      }
      case 80 ... 89:
      {
        student.exams.totB++;
        return B;
        break;
      }
      case 70 ... 79:
      {
        student.exams.totC++;
        return C;
	break;
      }
      case 60 ... 69:
      {
        student.exams.totD++;
        return D;
	break;
      }
      case 0 ... 59:
      {
        student.exams.totF++;
        return F;
	break;
      }
   }
 }

 int sexCount(StuData& student)
 {
   if(student.sex == 'F')
    return student.totFe++;
   else
     return student.totMa++;
 }

 void examHighLow(StuData& student)
 {
   if(student.exams.highest == -1)
     student.exams.highest = student.exams.e1;
   else if (student.exams.highest < student.exams.e1)
     student.exams.highest = student.exams.e1;
   else if (student.exams.highest < student.exams.e2)
     student.exams.highest = student.exams.e2;
   else if (student.exams.highest < student.exams.e3)
     student.exams.highest = student.exams.e3;

   if(student.exams.lowest == -1)
     student.exams.lowest = student.exams.e1;
   else if (student.exams.lowest > student.exams.e1)
     student.exams.lowest = student.exams.e1;
   else if(student.exams.lowest > student.exams.e2)
     student.exams.lowest = student.exams.e2;
   else if(student.exams.lowest > student.exams.e3)
     student.exams.lowest = student.exams.e3;

 }

 void printAvgAndGrade(ofstream& outFile, StuData student)
 {
   switch(student.exams.stuGrade)
   {
     case A:
     {
       outFile << setw(15) << student.exams.examAvg;
       outFile << setw(10) << "A" << endl;
       break;
     }
     case B:
     {
       outFile << setw(15) << student.exams.examAvg;
       outFile << setw(10) << "B" << endl;
       break;
     }
     case C:
     {
       outFile << setw(15) << student.exams.examAvg;
       outFile << setw(10) << "C" << endl;
       break;
     }
     case D:
     {
       outFile << setw(15) << student.exams.examAvg;
       outFile << setw(10) << "D" << endl;
       break;
     }
     case F:
     {
       outFile << setw(15) << student.exams.examAvg;
       outFile << setw(10) << "F" << endl;
       break;
     }
   }
}

 void printInvalidData(ofstream& outFile)
 {
    outFile << setw(15) << "~~Invalid Data~~" << endl;
 }

 void printNoValidData(ofstream& outFile)
 {
   outFile << endl;
   outFile << "There no valid data." << endl << endl;
   outFile << "*< end >*" << endl;
 }
 void printStat(ofstream& outFile, StuData student)
 {
   student.perFe = (float(student.totFe) / float (student.exams.totA + student.exams.totB + student.exams.totC + student.exams.totD + student.exams.totF)) * 100;
   student.perMa = (float(student.totMa) / float (student.exams.totA + student.exams.totB + student.exams.totC + student.exams.totD + student.exams.totF)) * 100;


   outFile << endl;
   outFile << ">>Total A: " << student.exams.totA << endl;
   outFile << ">>Total B: " << student.exams.totB << endl;
   outFile << ">>Total C: " << student.exams.totC << endl;
   outFile << ">>Total D: " << student.exams.totD << endl;
   outFile << ">>Total F: " << student.exams.totF << endl << endl;

   outFile << ">> " << "Max of all exams: " << student.exams.highest << endl;
   outFile << ">> " << "Min of all exams: " << student.exams.lowest << endl << endl;
   outFile << ">> " << "Percent of Females: % " << student.perFe << endl;
   outFile << ">> " << "Percent of Males: % " << student.perMa << endl << endl;
   outFile << "*< end >*" << endl << endl;
 }

Volatile Pulse (1543)

This is a long program and it's hard for me to tell you exactly where with this, but creating a struct array is pretty simple. From glancing at your code, it looks like your teacher wants you to make a student array. The line StuData myStudents[100]; will make such an array that can hold 100 different students. You can access each object within the array almost exactly the same you would with any other object or array. myStudents[0].exams.examAvg; will give you the average exam grade of the first student in the array.

The purpose behind this is to prevent the need have to read from a file just to get your information. I hope this will help you get on the right path.

cast09 (3)

Thank you very much this actually helped a lot and im kicking myself for it being so simple my biggest problem was i was over complicating the whole thing.

Volatile Pulse (1543)

Welcome to programming 101, if it seems really simple, it probably is. If it seems overly complicated, it's probably because you made it that way.

cast09 (3)

yea i also made a mess of it the first time around i went back and pretty much rewrote it, one problem im facing now is how do i can i reprint the the data so that i can sort it.

Here is the main():


// New Struct StuData
*******************
struct StuData
{
    string name;
	int id;
	char sex;
	float e1;
	float e2;
	float e3;
	int examAvg;
	gradeType stuGrade;
};
//*********************
int main()
{
    ifstream inFile;
    ofstream outFile;

    inFile.open("in.data");
    outFile.open("out.data");

    outFile.setf(ios::fixed);
    outFile.setf(ios::showpoint);
    outFile.precision(2);

    printHead(outFile);
    readFile(inFile);

    stats.totA = 0;
    stats.totB = 0;
    stats.totC = 0;
    stats.totD = 0;
    stats.totF = 0;
    stats.highest = -1;
    stats.lowest = -1;
    stats.totMa = 0;
    stats.totFe = 0;
    stats.perFe = 0;
    stats.perMa = 0;
    stats.invalid = 0;

    while(inFile)
    {
        student[0].sex = sexUpper(student);
        sexCount(student);
        printData(outFile, student);

        if(validData(student))
        {

            student[0].examAvg = avg(student);
            stats.mean = stats.mean + student[0].examAvg;
            student[0].stuGrade = grade(student);

            examHighLow(student);
            printAvgAndGrade(outFile, student);

        }
        else
            printInvalidData(outFile);

        readFile(inFile);
    }

    if (stats.highest + stats.lowest == -2)
        printNoValidData(outFile);

    else

    printStat(outFile, stats);

}

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