Question

I got this simple program read in a string like “13 11 9 10”. I wanna split string then sort them. however the sort() seems not working, any help?
input: 13 11 9 10
, output: 13 11 9 10
Thanks!

#include <string>
#include <sstream>
#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;

vector<int> split(string s)
{
    istringstream iss(s);
    vector<int> result;

    do{
        string sub;
        iss>>sub;
        if(sub!="")
            result.push_back((int)atoi(sub.c_str()));
    }while(iss);

    return result;
}
int main(void)
{   
    string s;
    while(cin>>s)
    {
        vector<int> vec;
        vec=split(s);
        sort(vec.begin(), vec.end());
        for (int i = 0; i < vec.size(); ++i)
        {
            cout<<vec[i]<<endl;
        }
    }
}

Answer 1

That’s because cin >> s stops at the first whitespace.

In other words, if you type 1 4 2 3, s contains 1 only, and not the entire line.

Instead, use the following to read the entire line:

std::getline(std::cin, s);