vector issue

Code:

---

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

typedef vector<int> intVector;

int main()
{
        intVector vInt1(5);
        vInt1[0]=1;
        cout<<vInt1.size()<<endl;
        cout<<vInt1.capacity();
        return 0;
}

---

Output is:
5
5
which is supprising (at least for me)
I was expecting 1 5
Druring compiling I get two following warnings:

conversion from 'size_t' to 'unsigned int', possible loss of data

both for cout
I can get rid of them by casting to unsigned int
If someone can explain output.
whati is the difference between size() and capacity()

size() should give the number of elements, and capacity() the max number before more space must be allocated.

Maybe this would be clearer?

Code:

---

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

typedef vector<int> intVector;

int main()
{
        intVector vInt1;
        vInt1.reserve(5);
        vInt1.push_back(1);
        vInt1.push_back(0);
        cout<<vInt1.size()<<endl;
        cout<<vInt1.capacity();

        return 0;
}

---

I suspect that the reason for the warning is that the constructor doesnt accept a single integer as an argument.

It's working, thanks man