c++ - 连接字符串

Question

我想加入vector<string>成单string , 以空格分隔。例如，

sample
string
for
this
example

应该变成"sample string for this example" .
最简单的方法是什么？

Answer 1

#include <iterator>
#include <iostream>
#include <sstream>
#include <vector>
#include <algorithm>

std::vector<std::string> v;
...

std::stringstream ss;
std::copy(v.begin(), v.end(), std::ostream_iterator<std::string>(ss, " "));
std::string result = ss.str();
if (!result.empty()) {
    result.resize(result.length() - 1); // trim trailing space
}
std::cout << result << std::endl;