C++ program, Microsoft Visual Studio (codes) The attached text file contains not

Question

C++ program, Microsoft Visual Studio (codes)

The attached text file contains nothing but integers with values between -500 and 500. Write a program that counts how many values there are and how many values are negative (0 is counted as positive). Dynamically create an array to store the even values between 0 and 500. Using the statistics library, calculate the average and standard deviation to the array. Output the following to a text file: the total number of values, the number of negative values, the number of even values between 0 and 500, the average of those values, and the standard deviation of those values.

i have a attached file...containg random integer... if you can show me the coded attach the file with name aa which is put in on desktop of my computer named aa.txt

please help!!!!!

i got this code but its doesnt work

#include <iostream>
#include <fstream>
#include<math.h>

using namespace std;

int main(int argc, char * argv[])
{
ifstream myfile("D:\aa.txt", ios_base::in);//inpputting file. Giving file path

   int arr[1000];
int a,i=0, sum=0;
int countNeg=0, countEven=0;
printf("The file contains : ");
//Reading from file and putting it in a
while (myfile >> a)
{
   arr[i]=a;
   if(a<0)
   {
       countNeg++;
       }
       else if(a%2==0)
       {
           countEven++;
       }
printf("%d ", a);
i++;
}
printf(" Total numbers : %d",i);
printf(" Total number of negative numbers : %d",countNeg);
printf(" Total number of Even numbers : %d",countEven);

//Calculating Sum
for(int j=0;j<i;j++)
{
        sum=sum+arr[j];
}
//Calculating average
float avg=sum/i;
  
printf(" Average = %f ",avg);
  
float sum1;
//Calculating Standard Deviation
for (int k = 0; k < i; k++)
{
sum1 = sum1 + pow((arr[k] - avg), 2);
}
float sd=sqrt(sum1/i);
printf("Standard Deviation = %f ",sd);

getchar();
return 0;
}

Explanation / Answer

working code

/* This is C++ sample code for File I/O */
#include <iostream> // library that contain basic input/output functions
#include <fstream> // library that contains file input/output functions
#include <vector>
#include <math.h>
using namespace std;

float standard_deviation(vector<int> data, int n)
{
    float mean=0.0, sum_deviation=0.0;
    int i;
    for(i=0; i<n;++i)
    {
        mean+=data[i];
    }
    mean=mean/n;
    for(i=0; i<n;++i)
    sum_deviation+=(data[i]-mean)*(data[i]-mean);
    return sqrt(sum_deviation/n);         
}

int main()
{
fstream fp;
vector<int> numbers;
int number;
int count=0;
int neg=0;
int even=0;
int sum=0;
float avg=0;
float sd=0;

fp.open("test.txt", ios::in | ios::binary);

if(fp.is_open()){
while(fp >> number){
     numbers.push_back(number);
}
}

fp.close();

cout << "Numbers: ";
for (int i=0; i < numbers.size(); i++) {
    sum = sum+ numbers[i];
    count++;
    if (numbers[i]<0)
    neg++;
    if (numbers[i]%2 == 0)
    even++;
    cout << numbers[i] << ' ';
}
avg=sum/count;
sd=standard_deviation(numbers,count);
cout <<"Total numbers"<<count;
cout <<" Total Negative numbers"<<neg;
cout <<" Total even numbers"<<even;
cout<<" Sum of all the numbers"<<sum;
cout<<" Average of all the numbers"<<avg;
cout<<" SD of all the numbers"<<sd;
   return 0;
}

output here tested on runnable

http://code.runnable.com/VYjK7KApJ3AnWPpN/output

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