I need a write a program that reads from a file (a dat file) this numbers (for e

Question

I need a write a program that reads from a file (a dat file) this numbers (for example)

5
5 7 3 6 6
2
2 5

and calculates the standard deviation, mean, variance, sum, range. It should display like this format and write to another txt file.

|# of data| sum | range | mean | variance | standard deviation|

_____________________________________________________________________

| 5|    27| 3 to 7| 5.400|     2.300| 1.517 |

_____________________________________________________________________

| 7|    34| 2 to 7| 4.857| 3.143|                      1.773 |



I need a program like this for statistics written in c language. I plan to take c/C++ but not for a while. Any help appreciated.

Explanation / Answer

#include<iostream>

#include<cmath>

using namespace std;

//Function prototype declaration

double standard_Deviation(double x[],int n);

//Main function

void main()

{

ifstream inputFile;

ofstream outFile;

//variable declaration

double x[100];

double mean,sdeviation;

int i,n;

inputFile.open("Number.txt");

//Inputting array values

cout<<"Reading values from file:" <<endl;

inputFile>>num;

while(num>0)

{

x[i]=num;

i++;

inputFile>>num;

}

n=i;

//function call standard deviation

standard_Deviation(x,n);

//Outputting standard deviation

cout<<"Standard deviation:"<<sdeviation<<endl;

//pause system for a while

system("pause");

}

void standard_Deviation(double x[],int n)

{

ofstream outFile;

outFile.open("Output.txt");

double sd=0;

double mean,sum=0;

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

sum=sum+x[i];

mean=sum/n;

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

sd=sd+pow((x[i]-mean),2);

sd=sd/n;

outFile<<" sum | range | mean | variance | standard deviation|"<<endl;

outFile<<sum<<" "<<mean<<" "<<sd <<" "<<sqrt(sd)<<" ";

}//End standard_Deviation

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