Is this a bug in Turbo C 2.0?

[Simon A Reap]

In article <3210 at pur-phy> murphy at newton.physics.purdue.edu.UUCP
(William J. Murphy) writes:
>long SUM;
>short data1, data2, data3, data4, data5;
>SUM = data1 + data2 + data3 + data4 + data5;
>Here is the problem, when the sum of data? < 32767 it sums correctly on both
>GNU C and TC.  Hwen the sum of data? > 32767, TC does the rollover and 
>becomes negative while GNU C carries the sum as a long and returns the
: 
>SUM = (long)data1 + (long)data2 + (long)data3 + (long)data4 + (long)data5;
>solved the problem.
Microsoft C 5.1 (under OS/2) does the same (wrong) thing.  BTW, you only need
to (long) cast one of the data? to get the right result.
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