vector <int> string 化-优快云博客

本文通过两个示例展示了如何使用C++将std::vector容器内的整数转换为字符串，包括基本的实现方法和一个更为通用的函数模板。

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

using namespace std;

int main(int argc, char *argv[])
{
    vector<int> uin;
    for (int i = 0; i < 10; i++) {
        uin.push_back(i);
    }
    
    std::ostringstream stream;
    std::copy(uin.begin(), uin.end(), std::ostream_iterator<int>(stream, "_"));
    std::string s = stream.str();

    s.resize(s.length() - 1);
    cout<<s<<endl;
    return 0;
}

编译输出:

0_1_2_3_4_5_6_7_8_9

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

using namespace std;

string vector2str(const vector<unsigned int> &uin, const string& split)  
{
    if (uin.empty()) return "";
    std::ostringstream stream; 
    std::copy(uin.begin(), uin.end(), std::ostream_iterator<unsigned int>(stream, split.c_str()));
    std::string str = stream.str();
    str.resize(str.length() - split.size()); //去掉最后一个分隔符
    return str;
}


int main(int argc, char *argv[])
{
    vector<unsigned int> uin;
    for (unsigned int i = 0; i < 10; i++) {
        uin.push_back(i);
    }
    
    std::string outstr = vector2str(uin, "$_$"); 
    cout << outstr << endl;

    return 0;
}

转载于:https://my.oschina.net/tsh/blog/1549694