deque

[AVM8]

Use a for loop with a counter starting from 0 to store even numbers into a deque sequence container. The list of numbers should look like this:
20 18 16 14 12 10 8 6 4 2 0

#include <iostream>
#include <deque>
#include <iterator>
#include <algorithm>

using namespace std;
void main(void) {
	deque<double> values;
	ostream_iterator<double> output(cout, " ");

	values.push_front(0);
	values.push_back(2);
	values.push_front(4);
	values.push_back(6);
	values.push_front(8);
	values.push_back(10);
	values.push_front(12);
	values.push_back(16);
	values.push_front(16);
	values.push_back(18);
	values.push_front(20);

	cout << "Values contains (loop): ";
		for (int i; i < values.size(); ++i)
			cout << values[i] << ' ';
	cout << endl;
}

I got an error C4700 where it says uninitialized local variable 'i' used.

[MikeyBoy]

The error message is pretty clear. You're not initialising the value of i.

What do you think the result of i < values.size() will be, if you haven't given i a value?

What do you think the result of ++i will be, if you haven't given i a value?

[anup30]

#include <iostream>
#include <deque>
using namespace std;

int main() {
	
	deque<double> values;
	for(int i=0; i<=20; i+=2){
		values.push_front(i);
	}
	
	for(auto x: values){
		cout << x << " ";
	}
	
return 0;	
}

[AVM8]

MikeyBoy

anup30

i got another warning in the compiler where it states:

Warning 1 warning C4018: '<' : signed/unsigned mismatch c:\users\user\documents\visual studio 2013\projects\lab5\lab5\lab5.cpp 25 1 Lab5

[MikeyBoy]

The value returned by deque::size() is of type size_t, which is unsigned.

You've defined i as int, which is signed.

[AVM8]

MikeyBoy

Thank you. I will correct the error you state just now.

[AVM8]

MikeyBoy

I found the error where i done silly mistake where i wish to declare deque < int > values instead of deque <double> values.

using namespace std;
void main(void) {
	
        deque <int > values
	ostream_iterator<int> output(cout, " ");

p/s: my code is working.