如何变换向量< int>成字符串？ [英] How to transform a vector<int> into a string?

问题描述

我试图传递一个值从C ++到TCL。因为我不能传递指针而不使用一些复杂的模块，我想到将一个向量转换为一个char数组，然后将其作为一个null终止的字符串（这是相对容易）。

I am trying to pass a value from C++ to TCL. As I cannot pass pointers without the use of some complicated modules, I was thinking of converting a vector to a char array and then passing this as a null terminated string (which is relatively easy).

我有一个向量如下：

12, 32, 42, 84  

我想转换成类似：

"12 32 42 48"

我想到的方法是使用迭代器迭代通过向量，然后将每个整数转换为其字符串表示，然后将其添加到一个char数组（这是动态创建的，通过传递向量的大小）。

The approach I am thinking of is to use an iterator to iterate through the vector and then convert each integer into its string representation and then add it into a char array (which is dynamically created initially by passing the size of the vector). Is this the right way or is there a function that already does this?

推荐答案

这是什么：

std::stringstream result;
std::copy(my_vector.begin(), my_vector.end(), std::ostream_iterator<int>(result, " "));

然后你可以传递 result.str ）

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