使用c ++查找第三行

#include <iostream>
using namespace std;

int main() {
    int a[10][10];
    int i, j, n, m, sum;
    cout << "Enter the number of rows: ";
    cin >> n;
    cout << "Enter the number of columns: ";
    cin >> m;
    cout << "Enter the elements of the 2D array: ";
    for (i = 0; i < n; i++) {
        for (j = 0; j < m; j++) {
            cin >> a[i][j];
        }
    }
    for (i = 0; i < n; i++) {
        sum = 0;
        for (j = 0; j < m; j++) {
            sum = sum + a[i][j];
        }
        cout << "The sum of row " << i + 1 << " is " << sum << endl;
    }
    return 0;
}