如何读取一行整数到vector

输入如：

3 2 1 4 5 7 6

3 1 2 5 6 7 4

代码

bool read_list(vector<int>& a){string line;if (!getline(cin, line))return false;stringstream ss(line);int x = 0;while (ss >> x)a.push_back(x);}int main(){vector<int> mid, post;while (read_list(mid)){read_list(post);                ......          }return 0;}