Question

I know there are several C++ ways to load in values from a CSV, but I’m curious, how can I adapt this incorrect approach with the minimal changes necessary to make it work:

std::ifstream fileStream ("File.txt");    // File.txt reads "1,2,3"
short numbers[3];

for (short i = 0; i < 3; ++i)
    fileStream >> numbers[i];

Is there any way that I can do this using ifstream::operator>>, while keeping as conceptually close as possible to this implementation? Fix this code! 🙂

Thanks! Believe it or not, this will be very helpful in a computational neutrino physics project I’m working on.

Answer 1

As a quick fix reading the comma into a temporary variable will let you get the data out of the file.

std::ifstream fileStream ("File.txt"); 
short numbers[3];
char delim;

fileStream >> numbers[0];
for (int i = 1; i < 3; ++i){
    fileStream >> delim;
    fileStream >> numbers[i];
}