//first i read a csv file , then do some data process and analysis to build a physics model to test //some function. The following is some of my C++ code.

static unordered_map<double, TrackData> ReadCsvFile(const string& 
filePath) {...

string line;
getline(file, line);

while (getline(file, line)) {
istringstream iss(line);
vector<string> values;
string value;
while (getline(iss, value, ';')) {
values.push_back(value);
}...

trackData.TrackID = stod(values[0]);
trackData.Type = values[1];

trackData.TrackWidth = stod(values[2]);
trackData.TrackWidthDisplacement = stod(values[3]);
trackData.TrackLength = stod(values[4]);
trackData.TrackLengthDisplacement = stod(values[5]);`

//////////////////////////////////////////
and the data in the csv file is shown below.

1; Car; 2.0000; 0.0000; 5.0000; 0.0000; “Gate 14”; 73.200000; “Gate 15”; 74.233333; 7.71; 26.846970;…

but the output is to be “Invalid argument: invalid stod argument in line:…..”

hope someone could give some tips , thanks a lot and appreciate for your reading