Extracting data from excel to c.

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C

MS-Excel

I intend to extract data from excel into my program. What i want is the data from excel should be stored as an array in my program.
I have written the following code but it does not work.

f1=fopen("Cost.xls" , "r");
  for(i=1;i<=m;i++)
	{
	 	for(j=1;j<=n;j++)
			{
		 		fscanf(f1,"%d",&c[i][j]); 
			}
		fprintf(f1, "\n");
	}
  fclose(f1);