Not sure how to Proceed...

[CodeMonkey05]

I have to do this last part for my assignment:

Create a for loop that takes in the user's input.
Create a for loop that reads integer values off of a file named ExamScore.txt
Create a for loop that creates random numbers from 1-100

(Original directions)
o Write a switch statement where cases are defined by the variable choice. Under each case, write the appropriate for-loop to get the scores from the chosen way and store them in the array Exam.
o To get a random real number between 0 and 100 (including the end values), use
x = (rand()%1001)/10.0;
o To read from a file named ExamScore.txt write the following declaration above main() and use f_cin instead of cin.
ifstream f_cin(“ExamScore.txt”, ios::in);
o Before you run the program, you must create a file named ExamScore.txt. To do that either use Notepad or open a file in the compiler editor and enter the exam scores (as many as SIZE) and save the file with the name ExamScore.txt.
o Make sure you include the file <fstream> in “stdafx.h”
o Run the program with NumOfExams as 3. Each time choose a different option.

Here's the code:

#include "stdafx.h"

#define LENGTH 10
#define FormatLength 4

void GetClassInfo(int &, int &);
void GetScore(float *, int);
void ReadMin(float *); 
float ComputeAvg(float *, int );
float FindHighestScore(float *, int);
float FindLowestScore(float *, int);
int FindNum(float *, int , float);
void Print(float *, int); 
void PrintResults(int,  float, float, float, int *);

ofstream f_cout("Project2_PartC.txt", ios::out);
ifstream f_cin("ExamScore.txt", ios::in);


int main()
{
	// Storage
	float *Exam, avg, highest, lowest, Min_Pass = 0, Min[5];
	int SIZE, Num[5], NumOfExams, ExamCounter;


	GetClassInfo(SIZE, NumOfExams);
	Exam = new float [SIZE];

	// Input

	for (int i = 0; i < NumOfExams; i++)
	{

	GetScore(Exam, SIZE); 
	ReadMin(Min);

	// Process
	avg = ComputeAvg(Exam, SIZE);
	highest = FindHighestScore(Exam, SIZE);
	lowest = FindLowestScore(Exam, SIZE);

	    for (int j = 0; j < 5; j++)
	    {
		    Num[j] = FindNum(Exam, SIZE, Min[j]);
	    }

	// Output
	
	cout << "Exam: "<< i + 1;

	Print(Exam, SIZE);
	PrintResults(SIZE, avg, highest, lowest, Num);
	}

	return 0;
}

void GetClassInfo(int &n, int &Exams)
{

	cout << "Enter number of students: ";
	cin >> n;
	cout << "Enter the number of Exams: ";
	cin >> Exams;

}

// Input

void GetScore(float *Ex, int n) // reads the scores entered
{
	int choice;
	//float scores;

	cout << endl << endl;
	cout << "Where do I get these scores?\n\n";
	cout << "1) User enters the scores\n" 
	<< "2) Read the scores from a file\n" << "3) Generate the scores randomly\n\n";
	cout << "Enter your choice [1 or 2 or 3]: ";
	cin >> choice;

	switch (choice) // Part D calls for a Switch Statement to allow the user to select a choice
	{
	case 1:
		for (int i=0; i<n; i++)
	    {
			cout << "Enter grades: ";
			cin >> Ex[i];
	    }
		break;

	case 2:
		for (int i=0; i<n; i++)
		{
			ifstream file;
			file.open("ExamScore.txt");
			while (file >> i) 
			{
				cout << fixed << showpoint << setprecision(1) << i << endl;
			}
			//cout << "Enter grades: ";
			//f_cin >> Ex[i];
	    }
		break;

	case 3:
		for (int i = 0; i < n; i++)
		{
			Ex[i] = (rand()%1001)/10.0; 
			cout << Ex[i] << " ";
		}
		break;
	}
}

void ReadMin(float *min) // stores values for getting an A, B, C, D, and passing.
{
	cout << endl << endl;
	cout << "Enter the minimum score for an A, B, C, D, and passing: " << endl;

	for (int i = 0; i < 5; i++)
	{
		cin >> min[i];
	}
	//fixed << showpoint << setprecision(1)
	cout << endl << endl;
	f_cout << "GRADE DISTRIBUTION:\n\n";
	f_cout << "A: " << fixed << showpoint << setprecision(1) << min[0] << setw(FormatLength) << " ";
	f_cout << "B: " << min[1] << setw(FormatLength) << " ";
	f_cout << "C: " << min[2] << setw(FormatLength) << " ";
	f_cout << "D: " << min[3] << setw(FormatLength) << " ";
	f_cout << "P: " << min[4];
	cout << endl << endl;
}


// Process
float ComputeAvg(float *Ex, int n) // Computes the average
{
	int i;
	float sum = 0;
		for (i = 0; i < n; i++)
		{
			sum = sum +Ex[i];
		}
			return (sum/n);
}


float FindHighestScore(float *Ex, int n) //Finds the highest score
{
	float high = Ex[0];

	for (int i = 1; i < n; i++)
	{
		if (high < Ex[i])
			high = Ex[i];	
	}

	return high;
}


float FindLowestScore(float *Ex, int n) // Finds the lowest score
{
	float low = Ex[0];

	for (int i = 1; i < n; i++)
	{
		if (low > Ex[i])
			low = Ex[i];	
	}

	return low;
}


int FindNum(float *Ex, int n, float Min_P)
{
	int i, count = 0;
	for(i=0; i<n; i++)
	{
		if(Ex[i] >= Min_P)
			count++;
	}

	return count;
}


// Output

void Print(float *Ex, int n)//by ref, by value
{
	for (int i = 0; i < n; i++)
	{
		if(i % LENGTH == 0) 
			cout << endl << endl;
		cout << setw(FormatLength) << " " << Ex[i];
	}
}


void PrintResults(int n,  float av, float high, float low, int *Num) // Prints the average, highest and lowest score, number who passed and failed, and how many got A, B, C, and D.
{ //cout << fixed << showpoint << setprecision(1);
	f_cout << endl << endl;
	f_cout << "Average Score is ......: " << setw(FormatLength) << av << endl;
	f_cout << "Highest is ............: " << setw(FormatLength) << high << endl;
	f_cout << "Lowest is .............: " << setw(FormatLength) << low << endl;
	f_cout << "Number Passed is ......: " << setw(FormatLength-1) << Num[4] << endl;
	f_cout << "Number Failed is ......: " << setw(FormatLength-1) << n - Num[4] << endl;

	for (int i = 0; i < n; i++) // Uses a for loop to go through each score entered
	{
		switch (i) // Determines if the score is an A, B, C, or D and adds it to the number of students who got 'X' grade.
		{
		case 0:
			f_cout << "Number with an A.......: " << setw(FormatLength-1) << Num[i] << endl;
			break;

		case 1:
			f_cout << "Number with a B........: " << setw(FormatLength-1) << Num[i] - Num[0] << endl;
			break;

		case 2:
			f_cout << "Number with a C........: " << setw(FormatLength-1) << Num[i] - Num[1] << endl;
			break;

		case 3:
			f_cout << "Number with a D........: " << setw(FormatLength-1) << Num[i] - Num[2]  << endl;
			break;
		}
	}
	cout << endl << endl; 
}

How do I read the integers into the file and how do I make my integers random every time the program is run?

EDIT: I figured out the random part.

[SamuelAdams]

How do I read the integers into the file

This makes no sense, are asking to read from a file or write to a file.

Looking at your code, it doesn't look like you have opened the files to read or write.

ifstream InputFile;
ofstream OutputFile;
InputFile.open ("infile.txt");
OutputFile.open ("outfile.txt");

your code in "void PrintResults" looks good to write to a file.