Question

阅读问题,我已决定,我需要这样作:

<代码>list<vector<double> > psips;

for a simulation in c++. The question is, what is the simplest (and a reasonably efficient) way of initiating a list like this containing N vectors with d zeros in each?

Cheers!

Answer 1

std::list<std::vector<double> > psips(N, std::vector<double>(d));

See #3 here和2 here。

Answer 2

您可使用中层构造,并将违约值定为零:

explicit vector ( size_type n, const T& value= T()); explicit list ( size_type n, const T& value = T())

So what you would do is:

http://www.ohchr.org。

list< vector < double > > your_list(N, example);

此外,还有一份含有零的病媒和病媒清单。

Answer 3

 std::list<std::vector<double> > psips(100, std::vector<double>(10, 20.0));

清单中每个病媒都有<代码>10元素,每个元素的初始编号为20.0<>。清单中此类病媒的总数为100。

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