Reading colums with tab spaces

Hello All,
I have to read a file which contains colums such as below.

Code:

---

Net        Name                #Pins        Driver                Recvs. (block, pin)

0        i_63_                3        (  0,  -1)        ( 180,  0)        ( 226,  0)
1        i_50_                14        (  1,  -1)        ( 218,  0)        ( 245,  0)        ( 253,  0)        ( 266,  0)        ( 287,  0)        ( 291,  0)        ( 302,  1)

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I need to read the Net, then the Driver column and then the Recvs colum i.e. I need 0 then (0,-1) then (180,0) and then (226,0). I need these variables to compare with another file so I would typically require them to be stored as ints and after each line I compare them wioth another file then read the next line and so on. The number of colums is not fixed and the columns are separated by tabs.
I am a little confused as to how to proceed. Any help?
Thanks all.

why not use fread() function to read a whole record at a time into the sturcture and then u can get what ever field u wanted like net and driver.

s.s.harish

I cannot understand how to read the fields. I do use fgets to read line by line from the file. But I cannot understand how to read specifically the "0" then the "180" and so on.

You may want to use fscanf something like this.

Code:

---

#include <stdio.h>

int main(void)
{
  static const char filename[] = "test.txt";
  FILE *file = fopen(filename, "r");
  if ( file != NULL )
  {
      int  i, net, pins;
      char name[14];

      fscanf(file, "%*[^\n]%*c%*[^\n]%*c"); /* read and discard first 2 lines */

      while ( fscanf(file, "%d\t%13[^\t]\t\t%d", &net, name, &pins) == 3 )
      {
        printf("net = %d, name = \"%s\", pins = %d:\n", net, name, pins);
        for ( i = 0; i < pins; ++i )
        {
            int block, pin;
            if ( fscanf(file, "\t(%d,%d)", &block, &pin) == 2 )
            {
              printf(" %2d - block = %d, pin = %d\n", i, block, pin);
            }
        }
      }
      fclose(file);
  }
  else
  {
      perror(filename);
  }
  return 0;
}

/* my output
net = 0, name = "i_63_", pins = 3:
  0 - block = 0, pin = -1
  1 - block = 180, pin = 0
  2 - block = 226, pin = 0
net = 1, name = "i_50_", pins = 14:
  0 - block = 1, pin = -1
  1 - block = 218, pin = 0
  2 - block = 245, pin = 0
  3 - block = 253, pin = 0
  4 - block = 266, pin = 0
  5 - block = 287, pin = 0
  6 - block = 291, pin = 0
  7 - block = 302, pin = 1
*/

---

But you could also continue to use sscanf if you messed around with a %n to keep track of where you end up in the line of text.

Thanks,
I was using sscanf but ran into few problems as I could not keep track on the elements, so I used fscanf.