# median using a vector

Bjarne Stroustrup “Programming Principles and Practice Using C++”
Chapter 4 Exercise 2
Using std_lib_facilities.h by Bjarne Stroustrup.

```//	Philipp Siedler
//	Bjarne Stroustrup's PP
//	Chapter 4 Exercise 2

#include "std_lib_facilities.h"

int main() {
vector<double> temps;
double temp;

cout << "Enter a double\n";

//pushing new temperature values into temps vector
while (cin >> temp)
{
temps.push_back(temp);
cout << "type another double or press n to continue and calculate the median temperature.\n";
}

//displaying vector size
cout << "size of vector: " << temps.size() << '\n';

//sorting temps vector
sort(temps); //sort(temps.begin(), temps.end());

//calculate median
double median;
if (temps.size() % 2 == 0)
median = (temps[temps.size() / 2 - 1] + temps[temps.size() / 2]) / 2;
else
median = temps[temps.size() / 2];
cout << "Median temperature: " << median << endl;

keep_window_open("-");
}
```
```Output:
Enter a double
2.3
type another double or press n to continue and calculate the median temperature.
2.6
type another double or press n to continue and calculate the median temperature.
n
size of vector: 2
Median temperature: 2.45