I have a std::string that contains a random phrase.

For example:

std::string str{ "Lorem ipsum" };

I'd like to take that string and convert it into a std::vector<std::vector<char>> (each sub-array would have all the characters for one word in the phrase, i.e. splitting on spaces).

For example after the conversion:

std::vector<std::vector<char>> arr{ { 'L', 'o', 'r', 'e', 'm' }, { 'i', 'p', 's', 'u', 'm' } };

Furthermore, I'd like to then be able to convert the std::vector<std::vector<char>> back into a std::string.

Thank you for the help!

CodePudding user response：

#include <bits/stdc  .h>
using namespace std;


int main()
{
    vector<vector<char>> v;
    vector<char> c;
    string s = "hello world this";
    for(int i=0;i<s.size();i  )
    {
        
        if(s[i]==' ')
        {
            v.push_back(c);
            c.clear();
        }else{
            c.push_back(s[i]);
        }
    }
    for(int i =0;i<v.size();i  )
    {
        for(int j=0;j<v[i].size();j  )
        {
            cout<<v[i][j];
        }
        cout<<endl;
    }
    return 0;
}