How to read data from a file with text

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I want to extract data from a data file "test.dat" which contains some text as well. The file is as follows:

nx=200, ny=200
cow
1	2
5	6
4	9
2	0
3	8
goat
1	2
3	2
2	4

I have written the code as follows:

C

int A[10][10];
char buff[100];

FILE *in;
in=fopen("test.dat","r");

int i,j;

fgets(buff,100,in);
 fgets(buff,100,in);   

 for(i=1;i<=5;i++)
    {for(j=1;j<=2;j++)
        {fscanf(in,"%d",&A[i][j]);}}
        
      fgets(buff,100,in);   
      puts(buff);
    
for(i=6;i<=8;i++)
    {for(j=1;j<=2;j++)
        {
		  fscanf(in,"%d",&A[i][j]);
		}
	}	   
        fclose(in);

	
	
for (i=1;i<=8;i++)
    {
    for(j=1;j<=2;j++)
       {
           printf("%d\t",A[i][j]);
       }
           printf("\n");
    }

I get the following output:

1	2	
5	6	
4	9	
2	0	
3	8	
0	268501009	
0	2	
0	4200638

The first five lines are ok, but the last 3 lines are junk. Please suggest what needs to be done.

Posted 29-Jul-15 2:52am

Nipun_Arora

Updated 29-Jul-15 3:05am

CPallini

v2

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CPallini · Answer 1 · 2015-07-29T03:16:00

I would have written instead (warning, no error-checking performed):

C

 #include <stdio.h>
 #include <stdlib.h>

 #define BUFSIZE 100
 #define SIZE 10

int main()
{
  char buf[BUFSIZE];
  int a[SIZE][2];

  FILE * fp = fopen("test.dat", "r");

  int count = 0;
  while (fgets(buf, BUFSIZE, fp))
  {
    if (sscanf(buf, "%d %d", &a[count][0], &a[count][1]) == 2)
      count++;
  }

  int n;
  for (n=0; n<count; ++n)
  {
    printf("%d %d\n", a[n][0], a[n][1]);
  }

  fclose(fp);

  return 0;

}