Thread: cout question?

hello,
I cants get my output to work so i can see the last 2 statements. what am i doing wrong??

Code:

#include <iostream>	//cin, cout, <<, >.
#include <vector>	//for vector
using namespace std;

int main()
{
	vector<int> number,
		v(10, 20),
		w(10);
	
	int num;
	
	for (;;)	//forever loop
	{
		cin >> num;	//input numbers

		if (num < 0) //if true break else contine to next statement
			break;
		number.push_back(num);	//append number at end
		number.pop_back();	//pop_back eraes last number 
		number.push_back(number.front());	//append number to 1ts element
		
		cout << number.pop_back <<'\n'; //output
	}
		
	return 0;
}

Why do you push the number on, pop it off, and then puc the front back on to the back?

I dont either, this book i have wants me to do that so i get used to these, i guess.

Anyways...

i input numbers: 99 33 44 88 22 11 55 66 77 -1
it should read these and out put the numbers with the last element erased because of the pop_back then return a refenece to num's first element.

like so 99 33 ... 55 66 then return 77 to the first element.

I trued placing those last two staements into my cout but did not work. I understand how this is suppose to work but getting the program to accomplish it is a different task. I hope to figure this out??

It works!
Thanks Imperito!

pop.back() is a void function. It pops the number off the back, but does NOT return the value thereof!!!!!

My compiler caught that and i changed it to output the number so i could see what it was doing. It really works now!
Thanks for helping me with that also Imperito.