c++ - 将值从 vector 存储为字符串作为逗号分隔值

Question

如何将函数返回的值作为逗号分隔值存储到字符串中。谁能帮帮我……？

const myVector &vecList = obj.get_List();
vector<myNumVector *>::const_iterator iter;
for (iter= vecList.begin(); iter!= vecList.end(); iter++)
{
  string myNum = (*iter)->get_myNum();
  string myNumList = ? 
  //myNumList should be = drt123,ret34,dfghgd234.... if these are the return values
} //can we achive this by use of some sting functions..?

Answer 1

从我发布的链接可以看出，有很多方法可以做到这一点。我相信这是最简单的:

#include <vector>
using std::vector;

#include <string>
using std::string;

#include <boost/assign/list_of.hpp>
using boost::assign::list_of;
namespace ba = boost::assign;

vector<string> victor = list_of
  ("Clarence Oveur")
  ("Roger Murdock")
  ("Victor Basta");

int main() {
  string result;
  for(vector<string>::iterator it = victor.begin();
    it != victor.end();
    ++it) {
    if(it != victor.begin()) {
      result += ", ";
    }
    result += *it;
  }
  cout << result << "\n";
}

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编辑:直接翻译成 OP 的问题:

const myVector &vecList = obj.get_List();
vector<myNumVector *>::const_iterator iter;
string myNumlist;
for (iter= vecList.begin(); iter!= vecList.end(); iter++)
{
  string myNum = (*iter)->get_myNum();
  if(iter!=vecList.begin()) {
    nyNumList += ",";
  }
  myNumList += myNum;
}

---

编辑:通过从以前的解决方案中删除 bool first 来简化。