c++
#include <iostream>
using namespace std;
int main() {
int n, sum = 0;
cout << "Nhap so phan tu cua mang: ";
cin >> n;
int arr[n];
for(int &i : arr) {
cout << "Nhap gia tri cho phan tu: ";
cin >> i;
}
for(int i : arr) {
sum += i;
}
cout << "Tong cac phan tu trong mang la: " << sum << endl;
return 0;
}