Hello I'm new to c++ i need help with a area and perimeter function. I can get the program to run fine with out using it as function but cant with trying to get it to run as a function.

Here is my code:

```
#include <iostream>
using namespace std;
int main()
{
int width;
int length;
int area;
int perimeter;
cout << " Please enter the width and length of a rectangle " << endl;
cin >> width >> length;
area= width*length;
perimeter= 2*(width+length);
cout << " The area is " << area << endl;
cout << " The perimeter is" << perimeter << endl;
system("pause");
return 0;
}
```

but question is how can i get the area and perimeter to work as a function any help would be very much appreciated thank you.