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Suppose that you have a file that contains information about both stock trades
and bond trades. Further suppose that trades are described in terms of
the price per share, the number of shares traded, and the price–earnings
ratio of the stock (an integer); bond trades are described in terms of
the price per bond, the number of bonds traded, and the current yield of
the bond (a floating point number). In both cases, the type of trade is
marked by a leading integer, which is 0 for stock trades
and 1 for bond trades:
0 3.3 300 10 0 2.5 400 15 1 9.9 100 4.5 1 10.1 100 6.2 0 5.0 200 12 ...