C++向量指针:指向变量指针的常量向量？

Question

我有两个常量向量:

const vector<int> A = { 0, 12, 23, 34, 45, 56, 67, 78, 89 };
const vector<int> B = { 13, 24, 35, 46, 57, 68, 79 };

我想像这样在他们之间切换

int main()
{
  vector<int> myVector;

  if ( something happens )
    point myVector to A;
  else
    point myVector to B;

  while ( a condition )
  {
    do something with ( myVector );
  }
}

我如何指向矢量A或B我应该如何声明myVector？

Answer 1

你可以使用一个参考:

auto& myVector = somethingHappens ? A : B;
while ( a condition ) {
    do something with ( myVector );
}

现在myVector是一个"新名"无论是A或B,根据您的病情.