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#include<iostream>
#include<fstream>
#include<cmath>
#include<string>
using namespace std;
const int ArrayMax=1000;
double maxval(const double x[], int n);
double minval(const double x[], int n);
double aveval(const double x[], int n);
double standev(const double x[], int n);
void selectionSort(int array,int length);
int main ()
{
int data=0;
int grades_amount = 0;
double y[ArrayMax], array;
ifstream file;
ofstream outfile;
outfile.open("Sorted_Grades_Spring2012.txt");
outfile<<selectionSort(array,data)<<endl;
outfile.close();
file.open("Grades_Spring2012.txt");
if(file.fail())
{
cerr<<"Error opening input file."<<endl;
system("pause");
exit(0);
}
file>>array;
while ((data<ArrayMax) && !file.eof())
{
y[data]=array;
++data;
file>>array;
cout<<array<<endl;
++grades_amount;
}
cout<<endl;
cout<<"The total number of grades is "<<grades_amount<<endl<<endl;
cout<<"The Maximum score is "<<maxval(y, data)<<endl<<endl;
cout<<"The Minimum score is "<<minval(y, data)<<endl<<endl;
cout<<"The Average score is "<<aveval(y, data)<<endl<<endl;
cout<<"The Standard deviation is "<<standev(y, data)<<endl<<endl;
file.close();
system("pause");
return 0;
}
double maxval(const double x[], int n)
{
double maxVal, k;
maxVal=x[0];
for (int k=1; k<n; ++k)
{
if (x[k]>maxVal)
maxVal=x[k];
}
return maxVal;
}
double minval(const double x[], int n)
{
double min;
min=x[0];
for (int k=1; k<=n-1; ++k)
{
if (x[k]<min)
min=x[k];
}
return min;
}
double aveval(const double x[], int n)
{
double sum(0);
for (int k=0; k<n; ++k)
{
sum += x[k];
}
return sum/n;
}
double variance(const double x[], int n)
{
double sum(0), mu;
mu=aveval(x,n);
for (int k=0; k<n; ++k)
{
sum += (x[k]-mu)*(x[k]-mu);
}
return sum/(n-1);
}
double standev(const double x[], int n)
{
return sqrt(variance(x,n));
}
void selectionSort(int *array,int length)
{
int i,j,min,minat;
for(i=0;i<(length-1);i++)
{
minat=i;
min=array[i];
for(j=i+1;j<(length);j++)
{
if(min>array[j])
{
minat=j;
min=array[j];
}
}
int temp=array[i] ;
array[i]=array[minat];
array[minat]=temp;
}
for(int i=0;i<10;i++)
cout<<array[i]<<endl;
}
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