详情参考C++中stringstream样例

#include<iostream>
#include <sstream>  
using namespace std;
int main(){
    string a, b, c, d; 
    string lines="adfa;asdfasd;fasdf;ccc";  
    stringstream line(lines);  //可以直接初始化
    getline(line, a, 'f'); 
    getline(line, b, ';');   //接收分割之后的前半部分
    getline(line, c, ';'); 
    getline(line, d);     //与不同的getline搭配
    cout<<"a = "<<a<<endl; 
    cout<<"b = "<<b<<endl; 
    cout<<"c = "<<c<<endl; 
    cout<<"d = "<<d<<endl;  
}


//运行结果
a = ad
b = a
c = asdfasd
d = fasdf;ccc

例题

class Solution {
public:
    string sortSentence(string s) {
        stringstream line(s);
        vector<string> res(210);
        string a;
        while(getline(line,a,' ')){
            int num = a[a.size() - 1] - '0';
            res[num] = a.substr(0,a.size() - 1);
        }
        string ans;
        for(int i = 0;i < 210;++i){
            if(res[i] != "") ans += res[i] + ' ';
        }
        ans.erase(ans.end() - 1);
        return ans;
    }
};