如何输出vector<string>类型函数的返回值？#数据结构#打印朋友圈问题

Question

我在完成一个打印朋友圈的问题，目的是输入汉语拼音后通过定义的getFriendCircle函打印出这个人的朋友圈，即将结构体中函数getFriendCircle的返回值onesFriendCircle输出，但是我没做到，以下是我的回答。因为我刚接触C++，可能问题很简单，请帮我改正，不胜感激！！

#include<iostream>
#include<string>
#include<map>
#include<vector>
#include<algorithm>
#include<stdio.h>
using namespace std;
class FriendCircle{
    private:
        map<string,map<string, int>>circle;
    public:
        void init(){
            circle["zhao"] = {{"qian",1},{"sun",2},{"li",3},{"zhou",4},{"wu",5},{"zheng",0},{"wang",0}};
            circle["qian"] = {{"zhao",2},{"sun",6},{"li",1},{"zhou",1},{"wu",0},{"zheng",0},{"wang",0}};
            circle["sun"] = {{"zhao",0},{"qian",2},{"li",1},{"zhou",0},{"wu",1},{"zheng",3},{"wang",5}};
            circle["li"] = {{"zhao",6},{"qian",1},{"sun",3},{"zhou",0},{"wu",0},{"zheng",1},{"wang",5}};
            circle["zhou"] = {{"zhao",0},{"qian",5},{"sun",3},{"li",3},{"wu",2},{"zheng",2},{"wang",0}};
            circle["wu"] = {{"zhao",1},{"qian",5},{"sun",2},{"li",0},{"zhou",3},{"zheng",0},{"wang",6}};
            circle["zheng"] = {{"zhao",5},{"qian",0},{"sun",0},{"li",1},{"zhou",1},{"wu",2},{"wang",1}};
            circle["wang"] = {{"zhao",3},{"qian",0},{"sun",0},{"li",2},{"zhou",5},{"wu",3},{"zheng",3}};
        }
        void update(){
            circle["zhao"]["zhou"] = 1;
            circle["zhao"]["zheng"] = 3;

            circle["sun"]["li"] = 5;

            circle["wu"]["sun"] = 5;
            circle["wu"]["wang"] = 1;

            circle["zheng"]["li"] = 3;
            circle["zheng"]["wu"] = 6;

            circle["wang"]["wu"] = 1;
        }
        vector<string> getFriendCircle(string& name){
            vector<pair<int, string>>friends;
            for(auto& item : circle[name]){
                friends.emplace_back(make_pair(item.second, item.first));
            }
            sort(friends.begin(), friends.end());
            vector<string>onesFriendCircle;
            for(auto& friendpair : friends){
                onesFriendCircle.emplace_back(friendpair.second);
            }
            return onesFriendCircle;
        }
        void printVector(vector<int>& onesFriendCircle){
                for(vector<int>::iterator it=onesFriendCircle.begin(); it!=onesFriendCircle.end(); ++it)
                cout<<*it<<endl;
                cout<<endl;
        }
};
string name;
int main(){
    FriendCircle fc;
    fc.init();
    fc.update();
    cin>>name;
    if(name!="zhao"&&name!="qian"&&name!="sun"&&name!="li"&&name!="zhou"&&name!="wu"&&name!="zheng"&&name!="wang")
        cout<<"WRONG";
    else {
        fc.getFriendCircle(name);
    }
//接下来不知道怎么写了。。。
}

Answer 1

vector vec = fc.getFriendCircle(name);
for (int i = 0; i < vec.size(); i++)
{
cout << vec[i] << endl;
}