Sum of array

#include<iostream>
using namespace std;

int main(){
    int t; cin >> t;
    while(t--){
        int n, m; cin >> n >> m;
        int num1[n], num2[m], i, k = n + m, result[k] = {0};
        //  Taking input of both array
        for(i = 0; i < n; i++) cin >> num1[i];
        for(i = 0; i < m; i++) cin >> num2[i];

        int cary = 0, j;
        k = 0;
        i = n-1, j = m-1;
        while(i > -1 && j > -1){
            int temp = num1[i--] + num2[j--] + cary;
            result[k++] = temp % 10;
            cary = temp / 10;
        }

        while(i > -1){
            cary = cary + num1[i--];
            result[k++] = cary % 10;
            cary /= 10;
        }
        while(j > -1){
            cary = cary + num2[j--];
            result[k++] = cary % 10;
            cary /= 10;
        }
        while(cary){
            result[k++] = cary % 10;
            cary /= 10;
        }
        for(i = k-1; i > -1; i--){
            cout << result[i] << ' ';
        }
        cout << endl;
    }
}