coding

#include <iostream>
#include <cmath>
#include <fstream>
#include <string>
#include <cstdlib>
#include<Windows.h>
using namespace std;

float calcSD(float arrayPass[320], int startcnt1, int endcnt1, int startcnt2, int endcnt2, int divcnt);
float calcAverage(float arrayPass[320], int startcnt1, int endcnt1, int divcnt);
float calcHighest(float arrayPass[320]);
float qAverage(float arrayPass[320], float minVal, float maxVal, int qcount);
float qstdDev(float arrayPass[320], float minVal, float maxVal, int qcount);
float qMinimum(float arrayPass[320], float* minVal, float* maxVal);
float qMaximum(float arrayPass[320], float* minVal, float* maxVal);

struct Data{
    float values[320];
};

struct Quantiles{
    float cntr,avg,stddev,qmin,qmax,sum,qx,qy;
};

int main()
{
    float low,high,result[320],f_final[320],j,stdDev=0,avg=0,resHighest=0;
    int x=0;
    int menu=0;
    string resFile[320];

    Data fx[2];
    j=1;
    for(int i=0;i<320;i++){
        result[i] = sin(j) + 1.0/(sin(j));
        j+=0.5;
    }

    /* Largest value last 100 */
    resHighest=calcHighest(result);
    for(int i=0;i<320;i++){
        fx[0].values[i]=result[i]-resHighest;
    }

    // Calculate Standard Deviation first 50 and last 50

    stdDev=calcSD(fx[0].values,0,50,270,320,50);
    for(int i=0;i<320;i++){
        fx[1].values[i]=fx[0].values[i]+stdDev;
    }


    /* Average first 100 values */
    avg=calcAverage(fx[1].values,0,100,100);
    for(int i=0;i<320;i++){
        f_final[i]=fx[1].values[i]-avg;
    }

    float minVal=0,maxVal=0,width=0;

    minVal=f_final[0];
    for(int i=0;i<320;i++){
        if(minVal>f_final[i])
            minVal=f_final[i];
        }

    maxVal=f_final[0];
    for(int i=0;i<320;i++){
        if(maxVal<f_final[i])
            maxVal=f_final[i];
        }

    width=(maxVal-minVal)/5;

    Quantiles q[5];

    //range 1
    q[0].qx=minVal , q[0].qy=minVal+width;

    //range 2
    q[1].qx=q[0].qy , q[1].qy=q[0].qy+width;

    //range 3
    q[2].qx=q[1].qy , q[2].qy=q[1].qy+width;

    //range 4
    q[3].qx=q[2].qy , q[3].qy=q[2].qy+width;

    //range 5
    q[4].qx=q[3].qy , q[4].qy=q[3].qy+width;

    q[0].cntr=0;
    q[1].cntr=0;
    q[2].cntr=0;
    q[3].cntr=0;
    q[4].cntr=0;
    /* First Quantile */
    for(int z=0;z<5;z++){
        for(int i=0;i<320;i++){
            if(f_final[i]>=q[z].qx && f_final[i]<q[z].qy){
                q[z].cntr++;
            }
        }
        if(q[z].cntr!=0){
            q[z].avg=qAverage(f_final,q[z].qx,q[z].qy,q[z].cntr);
            q[z].stddev=qstdDev(f_final,q[z].qx,q[z].qy,q[z].cntr);
            q[z].qmin=qMinimum(f_final,&q[z].qx,&q[z].qy);
            q[z].qmax=qMaximum(f_final,&q[z].qx,&q[z].qy);
        }else{
            q[z].avg=0;
            q[z].stddev=0;
            q[z].qmin=0;
            q[z].qmax=0;
        }
    }
    string name;
    int id,i,c,d;
    cout<< "Enter Your Name:" << endl;
    getline(cin,name);
    cout<< "Enter Student Id:" << endl;
    cin >> id;

    system("color 07");
    char a=177, b=219;
    cout<<"\n\n\n\n\t\t\t\tLOADING....";
    cout<<"\n";
    cout<<"\t\t\t\t";

    for (i=0;i<25;i++)
        cout<<a;
        c=rand()%200;
        Sleep(c);
        cout<<"\r";
        cout<<"\t\t\t\t";
    for (i=0;i<25;i++){
        cout<<b;
        d=rand()%150;
        Sleep(d);}
        system("pause>0");
        system ("CLS");

    do{
        cout<<"f(x) = sin (x) + cosec (x)"<<endl<<endl;
        cout<<"[1] View unfiltered values"<<endl;
        cout<<"[2] Save values to file"<<endl;
        cout<<"[3] View filtered values"<<endl;
        cout<<"[4] View in each quantile"<<endl;
        cout<<"[5] Exit"<<endl;
        cout<<endl;
        cout<<"Enter choice: ";
        cin>>menu;
        system("CLS");
        switch(menu)
        {
        case 1:
            {
                low=0,high=0;
                // Display in range of x
                while(low<1 || high>160.5){
                    cout<<"Range of x:";
                    cin>>low>>high;
                    if(low>=1 && high<=160.5){
                        break;
                    }
                }

                j=low;
                while(j<=high){
                    x=(j-1)*2;
                    cout << "sin("<<j<<") + cosec("<<j<<") = "<< result[x] << endl;
                    j+=0.5;
                }
            }
            system("PAUSE");
            system("CLS");
            break;

        case 2:
            {
                //Save to text file
                ofstream saveFile ("example.txt");
                if(saveFile.is_open()){
                    float p=1;
                    for(int i=0;i<320;i++){
                        saveFile<<"f("<<p<<") = "<<f_final[i]<<endl;
                        p+=0.5;
                    }
                    saveFile.close();
                }else{cout<<"Unable to open file";}

                cout<<"Values saved to text file."<<endl;
            }
            system("PAUSE");
            system("CLS");
            break;

        case 3:
            {
                short counter=0;
                string line;
                ifstream readFile ("example.txt");
                if (readFile.is_open()){
                    while ( getline (readFile, line ).good () ){
                        resFile[counter]=line;
                        counter++;
                    }
                    readFile.close();
                }else {cout << "Unable to open file";}
                // Display in range of x
                float low1=0,high1=0;
                while(low1<1 || high1>160.5){
                    cout<<"Range of x:";
                    cin>>low1>>high1;
                    if(low1>=1 && high1<=160.5){
                        break;
                    }
                }
                j=low1;
                while(j<=high1){
                    x=(j-1)*2;
                    cout << resFile[x] << endl;
                    j+=0.5;
                }
            }
            system("PAUSE");
            system("CLS");
            break;

        case 4:
            {
                cout<<"min = "<<minVal<<endl;
                cout<<"max = "<<maxVal<<endl;
                cout<<"width = "<<width<<endl<<endl;
                system("PAUSE");
                system("CLS");

                cout<<"First Quantile"<<endl;
                cout<<"Range of quantile 1 : "<<q[0].qx<<" <= q1 <= "<<q[0].qy<<endl;
                cout<<q[0].cntr<<" value found."<<endl<<endl;
                cout<<"Average = "<<q[0].avg<<endl;
                cout<<"Standard Deviation = "<<q[0].stddev<<endl;
                cout<<"Minimum = "<<q[0].qmin<<endl;
                cout<<"Maximum = "<<q[0].qmax<<endl;
                cout<<endl;
                system("PAUSE");
                system("CLS");

                cout<<"Second Quantile"<<endl;
                cout<<"Range of quantile 2 : "<<q[1].qx<<" <= q2 <= "<<q[1].qy<<endl;
                cout<<q[1].cntr<<" value found."<<endl<<endl;
                cout<<"Average = "<<q[1].avg<<endl;
                cout<<"Standard Deviation = "<<q[1].stddev<<endl;
                cout<<"Minimum = "<<q[1].qmin<<endl;
                cout<<"Maximum = "<<q[1].qmax<<endl;
                cout<<endl;
                system("PAUSE");
                system("CLS");

                cout<<"Third Quantile"<<endl;
                cout<<"Range of quantile 3 : "<<q[2].qx<<" <= q3 <= "<<q[2].qy<<endl;
                cout<<q[2].cntr<<" value found."<<endl<<endl;
                cout<<"Average = "<<q[2].avg<<endl;
                cout<<"Standard Deviation = "<<q[2].stddev<<endl;
                cout<<"Minimum = "<<q[2].qmin<<endl;
                cout<<"Maximum = "<<q[2].qmax<<endl;
                cout<<endl;
                system("PAUSE");
                system("CLS");

                cout<<"Fourth Quantile"<<endl;
                cout<<"Range of quantile 4 : "<<q[3].qx<<" <= q4<= "<<q[3].qy<<endl;
                cout<<q[3].cntr<<" value found."<<endl<<endl;
                cout<<"Average = "<<q[3].avg<<endl;
                cout<<"Standard Deviation = "<<q[3].stddev<<endl;
                cout<<"Minimum = "<<q[3].qmin<<endl;
                cout<<"Maximum = "<<q[3].qmax<<endl;
                cout<<endl;
                system("PAUSE");
                system("CLS");

                cout<<"Fifth Quantile"<<endl;
                cout<<"Range of quantile 5 : "<<q[4].qx<<" <= q5 <= "<<q[4].qy<<endl;
                cout<<q[4].cntr<<" value found."<<endl<<endl;
                cout<<"Average = "<<q[4].avg<<endl;
                cout<<"Standard Deviation = "<<q[4].stddev<<endl;
                cout<<"Minimum = "<<q[4].qmin<<endl;
                cout<<"Maximum = "<<q[4].qmax<<endl;
                cout<<endl;
            }
            system("PAUSE");
            system("CLS");
            break;

        case 5:
            cout<<"Thank you"<<endl<<endl;
            exit(0);
        }
    }while(menu!=5);

    return 0;
}

float calcSD(float arrayPass[320], int startcnt1, int endcnt1, int startcnt2, int endcnt2, int divcnt)
{
    float sd=0,sd1=0,sd2=0,sum1=0,sum2=0,mean1=0,mean2=0,variance1=0,variance2=0;
    for(int i=startcnt1;i<endcnt1;i++){
        sum1+=arrayPass[i];
    }
    mean1=sum1 / divcnt;
    for(int i=startcnt1;i<endcnt1;i++){
        variance1 += pow(arrayPass[i] - mean1, 2);
    }
    variance1/=divcnt;
    sd1=sqrt(variance1);
    /* ================================================ */
    for(int i=startcnt2;i<endcnt2;i++){
        sum2+=arrayPass[i];
    }
    mean2=sum2 / divcnt;
    for(int i=startcnt2;i<endcnt2;i++){
        variance2 += pow(arrayPass[i] - mean2, 2);
    }
    variance2/=divcnt;
    sd2=sqrt(variance2);

    sd = sd1+sd2;
    return sd;
}

float calcAverage(float arrayPass[320], int startcnt, int endcnt, int divcnt)
{
    float sumAverage=0,average=0;
    for(int i=startcnt;i<endcnt;i++){
        sumAverage+=arrayPass[i];
    }
    average=sumAverage/divcnt;
    return average;
}

float calcHighest(float arrayPass[320])
{
    float resHigh=0;
    resHigh=arrayPass[0];
    for(int i=220;i<=320;i++){
        if(resHigh<arrayPass[i])
            resHigh=arrayPass[i];
    }

    return resHigh;
}

float qAverage(float arrayPass[320], float minVal, float maxVal, int qcount)
{
    float sum=0,average=0;
    for(int i=0;i<320;i++){
        if(arrayPass[i]>=minVal && arrayPass[i]<maxVal){
            sum+=arrayPass[i];
        }
    }
    average=sum/qcount;
    return average;
}

float qstdDev(float arrayPass[320], float minVal, float maxVal, int qcount)
{
    float sd=0,sum=0,mean=0,variance=0;
    for(int i=0;i<320;i++){
        if(arrayPass[i]>=minVal && arrayPass[i]<maxVal){
            sum+=arrayPass[i];
        }
    }
    mean=sum/qcount;
    for(int i=0;i<320;i++){
        if(arrayPass[i]>=minVal && arrayPass[i]<maxVal){
            variance += pow(arrayPass[i] - mean, 2);
        }
    }
    variance/=qcount;
    sd=sqrt(variance);
    return sd;
}

float qMinimum(float arrayPass[320], float* minVal, float* maxVal)
{
    float minimum=10000;
    for(int i=0;i<320;i++){
        if(arrayPass[i]>=*minVal && arrayPass[i]<*maxVal){
            if(minimum>arrayPass[i]){
                minimum=arrayPass[i];
            }
        }
    }
    return minimum;
}

float qMaximum(float arrayPass[320], float* minVal, float* maxVal)
{
    float maximum=-10000;
    for(int i=0;i<320;i++){
        if(arrayPass[i]>=*minVal && arrayPass[i]<*maxVal){
            if(maximum<arrayPass[i]){
                maximum=arrayPass[i];
            }
        }
    }
    return maximum;
}