sum of n elements in C++

#include<iostream>
#include<numeric>
#include<vector>
using namespace std;
int main() {
    vector<int> nums;
    int n,i=0;
    cin >> n;
    nums.resize(n);
    while (i < n)   cin >> nums[i++]; n = 0;
    cout<<accumulate(nums.begin(), nums.end(),0);
}