Chapter 8 // Exercise 2 - Principles & Practice Using C++

In this exercise I am using Visual Studio Community 2017 and the header file "std_lib_facilities.h" which can be found here:

http://www.stroustrup.com/Programming/PPP2code/std_lib_facilities.h

Chapter 8 // Exercise 2

2. Write a function print() that prints a vector of ints to cout. Give it two arguments: a string for 'labeling' the output and a vector.

Not quite sure what he means when he wants us to 'label' the output. Does he mean a note that says "these numbers are from this vector"? That's how I've interpreted it anyway. For the print() function we pass a string reference to avoid copying data and since we are just printing the contents of a vector there is no need to modify it so it is passed via const reference. For this exercise I added a little in main just to show the function working.

#include "stdafx.h"
#include "std_lib_facilities.h"

//prints a given vector to the screen with a label
void print(string& label, const vector<int>& v)
{
 cout << label << ": " << endl;

 for (int i = 0; i < v.size(); ++i)
  cout << v[i] << endl;

 cout << '\n';
}

int main()
{
 vector<int> numberVector = { 1,2,3,4,5,6,7,8,9,10 };
 string label = "Vector of Numbers";

 print(label, numberVector);

 keep_window_open();

 return 0;
}