C++ 程序：计算矩阵各行元素之和

#include using namespace std; int main() { int m, n, sum; cin >> m >> n; for (int i = 0; i < m; i++) { sum = 0; for (int j = 0; j < n; j++) { int num; cin >> num; sum += num; } cout << sum << endl; } return 0; }