将未知长度的char **(c)转换为vector< string> (C ++) [英] Convert char** (c) of unknown length to vector<string> (c++)

问题描述

如何将C char **转换为C ++向量?是否可以使用某些内置功能来执行此操作，还是通过一系列迭代步骤来实现此功能更好?

How would one go about converting a C char** to a C++ vector? Is there some built-in functionality one can utilize to do this, or is it better to accomplish it through a series of iterative steps?

由于各种原因，C数组中的元素数量未知.我可以将其作为另一个参数传递，但这绝对必要吗?

For various reasons, the number of elements in the C array is unknown. It is possible I could pass that as another parameter, but is that absolutely necessary?

推荐答案

您可以简单地使用std::vector的构造函数，该构造函数需要两个迭代器:

You can simply use the constructor of std::vector that takes two iterators:

const char* arr[] = {"Hello", "Friend", "Monkey", "Face"};
std::vector<std::string> v(std::begin(arr), std::end(arr));

或者如果您确实有const char**:

const char** p = arr;
std::vector<std::string> v(p, p + 4);

由于数组到指针的转换，这也将直接使用arr而不是p.

Which will also work with directly using arr instead of p due to array-to-pointer conversion.

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