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#include <iostream>
#include <fstream>
#include <cmath>
using namespace std;
const int MAX_ARRAY = 500;
void getData(ifstream& inFile, int inValues[], int& size);
double getAverage(int inValues[], int dataSize);
void MaxMin(int theData[], int dataSize, int&Max, int&Min);
double StandardDev(int inValues[], int numElems, double Ave);
void QSummery(int inValues[]);
int main()
{
ifstream fileIn;
int theData[MAX_ARRAY]; // Array for data storage
int numElems; // Actual number of values in array
// (1 more than largest index)
int Max, Min; // decleration for maximum and minimum values
double Ave;
double SDev;
fileIn.open("avedata.txt"); // Open file
if (fileIn.fail() ) // Test for file existence
{
cout << "Problem opening file";
exit(-1);
}
// Read file and count values in array
getData(fileIn,theData,numElems);
// Determine and write average; test first for non-empty data file
if (numElems > 0)
{
Ave = getAverage(theData,numElems);
cout << "Average Test Score: " << Ave << endl << endl;
}
else
cout << "ERROR: No data processed" << endl << endl;
MaxMin(theData, numElems, Max, Min);
//return max and min value
if (numElems > 0)
cout << "Max: " << Max << " Min: " << Min << endl << endl;
else
cout << "ERROR: No data processed" << endl << endl;
SDev = StandardDev(theData, numElems, Ave);
//returns the standard deviation
cout << "The standard deviation for the data set is: " << SDev << endl;
QSummery(theData);
// Close file
fileIn.close();
system("pause");
return 0;
}
// This function reads integers from a file and stores the values in
// an array. It returns the loaded array and the number of elements
// in the array
void getData(ifstream& inFile, int inValues[], int& numVals)
{
int i = 0;
inFile >> inValues[i];
while (!inFile.eof() && i < MAX_ARRAY) // Test for end of file and array
{
i++;
inFile >> inValues[i];
}
numVals = i;
}
// This function receives an array of integers, calculates the average
// of the array values, and returns it.
double getAverage(int inValues[], int dataSize)
{
double sum = 0.0;
for (int i = 0; i < dataSize; i++)
sum = sum + inValues[i];
return sum / dataSize;
}
//This function will calculate and return the maximum and minimum value
void MaxMin(int theData[], int dataSize, int&Max, int&Min)
{
Max = theData[0]; // start with max = first element
for(int i = 1; i<dataSize; i++)
{
if(theData[i] > Max)
Max = theData[i];
}
Min = theData[0]; // start with min = first element
for(int i = 1; i<dataSize; i++)
{
if(theData[i] < Min)
Min = theData[i];
}
}
// This function will calculate the standard deviation of the numbers in the data set
double StandardDev(int inValues[], int numElems, double Ave)
{
double StandardDev;
double sum = 0;
double temp;
for (int i = 0; i < numElems-1; i++)
{
temp = inValues[i] - Ave;
sum = sum + pow(temp, 2);
}
StandardDev = sqrt(sum/ (numElems-1));
return StandardDev;
}
void QSummery(int inValues[])
{
double quartile4, quartile3, quartile2, quartile1;
for( int i = 1;)
if (inValues[i] > 74)
quartile4++;
else if (inValues[i] > 49)
quartile3++;
else if (inValues[i] > 24)
quartile2++;
else
quartile1++;
cout << "The Quartile 4, scores between 75 - 100 are as follows: " << quartile4 << endl;
cout << "The Quartile 3, scores between 50 - 74 are as follows: " << quartile3 << endl;
cout << "The Quartile 2, scores between 25 - 49 are as follows: " << quartile2 << endl;
cout << "The final Quartile, 1, scores between 0 - 24 are as follows: " << quartile1 << endl;
}
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