Problem in awk while adding large numbers

Hi,

I am facing a totalling error in awk while adding large numbers (when
the total 15 digits). Please see below:


host:/home/neil>cat test_awk.ksh
#!/bin/ksh

# test_awk.ksh
# Test script to test out summing up large numbers using awk

# TEST: Should result in 18 "9"s !!!
awk 'BEGIN { total = 0;
}

{ total += $1;
}

END{ printf( "%.0f\n", total );
}' << EF
000999999999999996
009000000000000000
090000000000000002
900000000000000000
000000000000000001
EF

host:/home/neil>test_awk.ksh
1000000000000000000



As you can see from the above awk is going with 1e+18 instead of
18 "9"s. Can someone please help me correct the above awk program so
that it prints the correct output?

Note: As per my requirements, 18 times "9"s is the maximum total that
can be generated.


Thanx

- Neil