1.初始化二维vector,为r*c的vector,所有值为0.
vector<vector<int> > newOne(r, vector<int>(c, 0));
2.用resize()来控制大小
vector<vector<int> > res;
res.resize(r);//r行
for (int k = 0; k < r; ++k){
res[k].resize(c);//每行为c列
}
1.初始化二维vector,为r*c的vector,所有值为0.
vector<vector<int> > newOne(r, vector<int>(c, 0));
2.用resize()来控制大小
vector<vector<int> > res;
res.resize(r);//r行
for (int k = 0; k < r; ++k){
res[k].resize(c);//每行为c列
}