C++实现int与string之间的相互转换

#include<iostream>
#include<sstream>
#include<string>

using namespace std;

string add_int(const string & version)
{
    stringstream ss;
    int vs;
    ss << version;
    ss >> vs;
    
    ++vs;
    stringstream ss2;
    ss2 << vs;
    return ss2.str();
}

int main()
{
    string temp = "12";
    string ans = add_int(temp);

    cout << "The ans is : " << ans << endl;

    return 0;
}