something wrong with the idea of creating a struct - how to fix it?

Hi,

Below is the first exercise on struct that I did. I have a feeling that I didn't get an idea behind the struct. Looking at the program I wrote, I am wondering what is the benefit of writing this program using struct. I could have write 5 functions for mean, median, smallest, largest, and call each of them when printing the results. The exercise asks me to create a struct, so it must imply that there's some benefit from using struct. I'm suspecting that I didn't get the idea... Could you please suggest some improvement? Thanks a lot...

Code:

`// Exercise 8.12`

#include "std_lib_facilities.h"

/*

Write a function that finds the smallest & the largest element of a vector

argument and also compute the mean and the median. Do not use global variables.

Either return a struct containing results or pass them back through reference

arguments. Which of the 2 ways of returning several result values do you prefer and why?

*/

struct stats {

vector<double> v;

double smallest, largest, median;

double fmean(vector<double>& v);

double fmedian(vector<double>& v);

double fsmallest(vector<double>& v);

double flargest(vector<double>& v);

};

int main()

try {

stats mystats;

vector<double> v;

double x;

cout << "Enter some elements for a vector: \n";

while (cin >> x)

v.push_back(x);

cout << "Here are some summary statistics: \n";

cout << "Smallest: " << mystats.fsmallest(v) << '\n';

cout << "Largest: " << mystats.flargest(v) << '\n';

cout << "Mean: " << mystats.fmean(v) << '\n';

cout << "Median: " << mystats.fmedian(v) << '\n';

}

catch (runtime_error e) {

cout << e.what();

}

double stats::fsmallest(vector<double>& v)

{

smallest = v[0];

for (unsigned int i = 0; i < v.size(); ++i) {

if (v[i] < smallest)

smallest = v[i];

}

return smallest;

}

double stats::flargest(vector<double>& v)

{

largest = v[0];

for (unsigned int i = 0; i < v.size(); ++i) {

if (v[i] > largest)

largest = v[i];

}

return largest;

}

double stats::fmean(vector<double>& v)

{

double sum = 0;

for (unsigned int i = 0; i < v.size(); ++i) {

sum += v[i];

}

return sum / v.size();

}

double stats:: fmedian(vector<double>& v)

{

sort(v.begin(), v.end());

median = 0;

for (unsigned int i = 0; i < v.size(); ++i) {

if (v.size()%2==0)

median = (v[v.size()/2] + v[v.size()/2-1])/2;

else

median = v[v.size()/2];

}

return median;

}