初始化指针向量(自动) [英] initialize vector of pointers (automatically)

问题描述

当尝试通过std::vector构造函数初始化指向NULL的指针向量时，遇到编译错误.我简化了说明以使其简单:

I encountered a compilation error when trying to initialize a vector of pointers to NULL by way of the std::vector constructor. I simplify the instruction to keep it simple:

vector<int*> v (100,NULL)

我想这与const T& value= T()(构造函数的参数)和非常大的NULL值之间的不兼容有关，但是我希望得到进一步的解释.

I guess it has something to do with an incompatibility between const T& value= T() (the parameter of the constructor) and the very value NULL, but I would appreciate some further explanation.

谢谢

推荐答案

如果有相关的C ++ 11支持，则可以使用nullptr:

If you have the relevant C++11 support, you could use nullptr:

std::vector<int*> v(100, nullptr);

但是，在您的特定情况下，无需指定默认值，因此满足以下条件:

However, in your particular case, there is no need to specify a default value, so the following would suffice:

std::vector<int*> v(100);

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