无法将字符串转换为float / double [英] Can't convert string into float/double

问题描述

我正在写一个类的代码，我从一个巨大的文件（约850行）的数据输入，用逗号分隔。我到目前为止是：

I'm writing a code for class where I take in input from a huge file (~850 lines) of data separated by commas. what I have so far is:

#include <iostream>
#include <string>
#include <sstream>
#include <fstream>
#include <vector>

using namespace std;

struct Station
{
string StationID, StationName;
float Elevation;
double Latitude, Longitude;
int Date, MXPN, MaxTemp, MinTemp, ObsTime;
};

int main ()
{
vector <string> Data;
string DummyLine, TempLine;
int Size = 0;

ifstream InputFile;
InputFile.open("finalc++.csv");
getline(InputFile, DummyLine);
while (InputFile.good())
    {
        getline(InputFile, TempLine);
        Size++;
        stringstream ss (TempLine);
        while (getline(ss, DummyLine, ',')) {
           Data.push_back(DummyLine);
        }

    }
Station Entry[Size];
for (int i = 0; i <= Size; i++)
    {
        Entry[i].StationID = Data[i * 10];
        Entry[i].StationName = Data[((i*10) + 1)];
        Entry[i].Elevation = Data[((i*10) + 2)];
        Entry[i].Latitude = Data[((i*10) + 3)];
        Entry[i].Longitude = Data[((i*10) + 4)];
        Entry[i].Date = Data[((i*10) + 5)];
        Entry[i].MXPN = Data[((i*10) + 6)];
        Entry[i].MaxTemp = Data[((i*10) + 7)];
        Entry[i].MinTemp = Data[((i*10) + 8)];
        Entry[i].ObsTime = Data[((i*10) + 9)];
    }


return 0;
}

我试过使用 stof 做到这一点，但不能得到它附近的工作。

I tried using stof to do this but could not get it anywhere near working. Any help would be appreciated.

推荐答案

托盘：

//this can be cause exeptions
Entry[i].Elevation = atof (Data[((i*10) + 2)].c_str());

注意：include cstdlib

NOTE: include cstdlib

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