10.cpp

#include <iostream>
#include <cmath>
using std::endl;
using std::cout;
using std::cin;

float getTotal (float nums[], int allNums){
  float answer=0.0;
  for (int i = 0; i < allNums; i++) {
  answer=answer+nums[i];
  }
  return answer;
}

float getAverage (float nums[], int allNums){
  float answer= getTotal (nums, allNums)/allNums;
  return answer;
}

float getDev (float nums[], int allNums){
  float sum=0.0;
  for (int i = 0; i < allNums; i=i+1) {
    float answer=pow(getAverage(nums, allNums)- nums[i], 2);
    sum=sum+answer;
  }

  float a=sqrt(sum/(allNums-1));
  return a;
}

int main (){
  int allNum=10, i, count = 1;
  float a[allNum], total, average, standard;
  cout << "Calculates total, average, and standard deviation of 10 numbers." << endl;
  for (i=0; i < allNum; i++) {
    cout <<"Type the " << count << " number: "<<endl;
    count++;
    cin >>a[i];
  }
  total= getTotal(a, allNum);
  average= getAverage(a, allNum);
  standard= getDev(a, allNum);
  cout <<"The total is: "<<total<<endl;
  cout <<"The average is: "<<average<<endl;
  cout <<"The standard deviation is: "<<standard<<endl;
return 0;
}