Reading from a text file and storing in a 2D array [duplicate]

Answer 1

#include 
#include 
#include 
#include 

using namespace std;

int main(void)
{
  FILE * fp;
  char * line = NULL;
  size_t len = 0;
  ssize_t read;

  const char *s = " ";
  char *token = NULL;

  int i = 0;
  double arr[200];
  int j;

  fp = fopen("g.txt", "r");
  if (fp == NULL)
  {
    printf("Error opening");
    exit(EXIT_FAILURE);
  }

  while ((read=getline(&line, &len, fp)) != -1)
  {
     token = strtok(line, s);

     while(token != NULL)
     {
       arr[i] = atoi(token);
       printf("%f\n", arr[i]);
       token=strtok(NULL,s);
       i++;
     }
  }

  exit(EXIT_SUCCESS);
  return 0;
}

getline will read file line by line and strtok will split entries based on space and will store seperately entries in array. Also single dimensional array is enough to store values.