初始化二维向量< int>在CPP [英] Initialize a 2 Dimensional vector<int> in CPP
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问题描述
如何在C ++中初始化二维向量< int> ？
How to initialize a 2 dimensional vector<int> in C++?
每个长度为8个int，如下所示
For instance I have 4 arrays each of length 8 ints, like the below
int a1[] = {1,2,3,4,5,6,7,8};
int a2[] = {1,2,3,4,9,10,11,12};
int a3[] = {1,2,5,6,9,10,13,14};
int a4[] = {1,3,5,7,9,11,13,15};
我有这个
vector< vector <int> > aa (4);
aa[i] (a1,a1+8);
但这会产生错误。我甚至试过提供数组a1到v1，并传递v1到 aa [i] ，仍然失败。
But this gives error. I even tried supplying the array a1 to v1 and passed v1 to aa[i] , still it fails.
那么，什么是初始化二维向量的元素的正确方法
So what would be the proper way of initializing the elements of a 2 dimensional vector<int>
推荐答案
aa[i].assign(a1,a1+8);
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