data in a file

[Unregistered]

I am trying to open a file and read its content which is:

1234 0.20
1256.7 0.45
345.56 0.29

each line has two set of numbers separated by a space.

I know how to open the file

but I want to use these numbers in calculatuion say the first number is income the second number is tax rate I want to calculate tax amount.

How can I have the program to take the first number and multiply it by the seconfd number and print the result on the screen
than do the same for the secon line.

I tried so many things but I am getting know where so please help

[Prelude]

Declare a buffer to read one whole line from the file into and then sscanf the values into the appropriate variables, print the product and get another line:

while ( fgets ( buff, sizeof buff, fp ) != NULL ) {
  if ( sscanf ( buff, "%lf %lf", &a, &b ) == 2 )
    printf ( "%f\n", a * b );
  else
    /* Complain */;
}

-Prelude

[Unregistered]

Thanks prelude...it works......