c++ - How to use ifstream to input a file into a 2D array? -

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• reading matrix text file 2d integer array c++ 2 answers

i'm struggling on overloading ifstream operator input file in matrix form , creating 2d array. 3x3 matrix. small part of assignment without whole assignment quite pointless.

file example:

1 2 3 4 5 6 7 8 6 

i have done way...

#include <iostream> #include <fstream> #include <string> #include <sstream>  using namespace std;  int main() {   int data[3][3];   int = 0;   int j = 0;   ifstream in(filename);   std::string line;   std::string temp;   while(std::getline(in, line))   {       std::istringstream iss(line);        // parse each line using input string stream       j = 0;       while(std::getline(iss,temp,' '))       {          data[i][j] = std::stoi(temp);          j++;       }       i++;   }   return 0; }