题目：一个文件中的一串数字，用逗号分割，位23.34,4242.42,343.......，要求读出并排序；
之前总结过，还是要多看看注意一下；
https://www.cnblogs.com/songlinxuan/p/12370059.html
代码：
#include<iostream>
#include<fstream>
#include<string>
#include<algorithm>
#include<vector>
using namespace std;
string path = "C:\\Users\\Reality\\Desktop\\random\\test.txt";
vector<double>vec;
int main() {
fstream fin;
string s;
fin.open(path, ios::in);
while (getline(fin,s,',')) {
double d = stod(s);
vec.push_back(d);
}
sort(vec.begin(), vec.end());
for (int i = 0; i < vec.size(); i++) {
cout << vec[i] << endl;
}
}