Reading numbers with scientific notation

Hi, I need some help with reading a set of numbers with scientific notations. Basically what my program does is that it reads a set of values in a text file, find the maximum value and then print it out.

My program works with values without scientific notation but crashes when I try to read text files containing scientific notations. Any ideas what I'm doing wrong?

The program works with this sort of file:

Code:

---

0.5 304.528
1.5 873.17
2.5 1636.12
3.5 1947.69
4.5 1189.97
5.5 1273.69
6.5 1650.59
7.5 1211.33
8.5 1211.71
9.5 1760.09

---

But crashes when I try to read this file:

Code:

---

5.50E+00        4.47E-02
6.75E+00        5.37E-02
7.00E+01        3.35E-02
8.25E+01        3.68E-02
9.50E+00        3.63E-02
1.75E+01        3.70E-02
2.00E+01        3.23E-02
3.03E+00        5.25E-02
4.05E+00        5.28E-02
5.08E+01        5.05E-02

---

The crash looks like this: http://img288.imageshack.us/img288/4775/crushbg3.jpg

My complier is quincy and I'm only allowed to use C

Code:

---

#include <stdio.h>
#define N 100


double max(double x[], double n);

main()
{

  int k=0;
  double y[N], q;
  FILE *data;


  data = fopen("textfile2.txt", "r");
 
  if (data == NULL)
          {
        printf("Error opening file. \n");
                exit(1);
        }
               
  else
  {
      while (fscanf(data, "%lf", &y[k]) == 1)
      {
          k++;
      }
     
          q = k;
   
      printf("Maximum value: %lf \n", max(y, q));
   
      fclose(data);
  }
 
  return 0;
 
}



/*  This function returns the maximum value. Maybe there's something wrong with the function? */

double max(double x[], double n)
{
 
  int k;
  double max_x;

 
  max_x = x[9];
  for (k = 1; k <= n - 1; k++)
  {
      if (x[k] > max_x)
            max_x = x[k];
  }

 
  return max_x;
 
}

---

Any help would be much appreciated, thanks!

Code:

---

#include <stdio.h>
#include <float.h>

int main()
{
  static const char filename[] = "file.txt";
  FILE *file = fopen(filename, "r");
  if ( file )
  {
      char line[BUFSIZ];
      double a, b, max = DBL_MIN;
      while ( fgets(line, sizeof line, file) &&
              sscanf(line, "%lf %lf", &a, &b) == 2 )
      {
        printf("a = %g, b = %g\n", a, b);
        if ( max < a )
        {
            max = a;
        }
      }
      fclose(file);
      printf("max = %g\n", max);
  }
  else
  {
      perror(filename);
  }
  return 0;
}

/* file.txt
5.50E+00        4.47E-02
6.75E+00        5.37E-02
7.00E+01        3.35E-02
8.25E+01        3.68E-02
9.50E+00        3.63E-02
1.75E+01        3.70E-02
2.00E+01        3.23E-02
3.03E+00        5.25E-02
4.05E+00        5.28E-02
5.08E+01        5.05E-02
*/

/* my output
a = 5.5, b = 0.0447
a = 6.75, b = 0.0537
a = 70, b = 0.0335
a = 82.5, b = 0.0368
a = 9.5, b = 0.0363
a = 17.5, b = 0.037
a = 20, b = 0.0323
a = 3.03, b = 0.0525
a = 4.05, b = 0.0528
a = 50.8, b = 0.0505
max = 82.5
*/

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