is it really necessary for character values to be positive?

[Gregory Smith]

In article <39 at houligan.UUCP> dave at murphy.UUCP writes:
>4. The value 255 can't be used because it may look like EOF on some systems.

for(i=0; i<30000; ++i) printf( "AAAAARRRRRRRRRRGGGGGGHHHH!!!!!!!!!\n");
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Greg Smith     University of Toronto      UUCP: ..utzoo!utcsri!greg
Have vAX, will hack...