forward_list例子

#include<iostream>
#include<forward_list>
#include<string>
using namespace std;

void insert(forward_list<string> &flist,string s1,string s2)
{
    auto prev=flist.before_begin();
    auto curr=flist.begin();
    while(curr!=flist.end())
    {
        if(*curr==s1)
        {
            flist.insert_after(curr,s2);
            break;
        }
        else
        {
            prev=curr;
            ++curr;
        }
    }
    if(curr==flist.end())
        flist.insert_after(prev,s2);
}

int main()
{
    forward_list<string> flist={"a","b","c","d","e"};
    insert(flist,"f","b");
    for(auto f:flist)
        cout<<f<<" ";
    cout<<endl;
    return 0;
}