Classes/Constructors

//Fill in the missing parts of this code

#include<iostream>

#include<string>

#include<fstream>

using namespace std;

class classGrades

{

public:

void printlist() const;

void inputGrades(ifstream &);

double returnAvg() const;

void setName(string);

void setNumStudents(int);

classGrades();

classGrades(int);

private:

int gradeList[30];

int numStudents;

string name;

};

int main()

{

classGrades intro(5), intermediate;

intro.printlist();

ifstream infile;

infile.open("data.txt");

if (!infile)

{

cout << "Error opening file!" << endl;

exit(1);

}

//set the name of the classGrades object intro to CSC126

//set the name of the object intermediate to CSC211

intermediate.setNumStudents(4);

//input the grades for intermediate from a file

//print the intermediate grades

//print the average of the intermediate grades

}

void classGrades::printlist() const

{

int i;

cout << "***" << name << "***" << numStudents<< endl;

for (i =0; i < numStudents; i++)

cout << i << ' ' << gradeList[i] << endl;

}

void classGrades::inputGrades(ifstream & in )

{

int i;

for (i = 0; i < numStudents; i++)

in >> gradeList[i];

}

double classGrades::returnAvg() const

{

int i;

double average;

double sum = 0;

//write code to return the average

}

void classGrades::setName(string n)

{

name = n;

}

void classGrades::setNumStudents(int x)

{

numStudents = x ;

}

classGrades::classGrades()

{

int i;

name = "";

numStudents = 30;

for (i = 0; i < 30; i++)

gradeList[i] = 0;

}

classGrades::classGrades(int n)

{

int i;

name = "";

numStudents = n;

for (i = 0; i < n; i++)

gradeList[i] = 0;

}

2. syntax for arrays of objects

classGrades allCS[15]; //the default constructor is applied to //all elements of this array

//to set the number of students in each class to 25

for (i = 0; i < 15; i++)

{

allCS[i].setNumStudents(25);

}

//Assume values in all classes. How can we print all class //averages?