Split string into vector with substring [duplicate]

How can i split a string into vector in substring? My code:

#include <iostream>
#include <vector>
using namespace std;
vector<string> split(string str, string delim)
{
   //How can I do it here?
}

int main()
{
    string str = "Hello\n_SPLITING_\nWorld!\n_SPLITING_\nHappy Coding!";
    vector<string> output = split(str, "\n_SPLITING_\n");
    for(int i = 0; i != output.size(); i++)
    {
        cout << output[i] << ";" << endl;
    }
}

and i want the output be:

Hello;
World!;
Happy Coding!;