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    <p>The number 200 is out of the value range for <code>signed char</code>. It wraps around into the negative value range in a two's complement way.</p> <p>Obviously the (implicit) signedness of <code>char</code> is defined to be <code>signed</code> on your platform. Note that this is not mandated by the standard. If it were <code>unsigned</code>, your program would print 200. For further reading on this topic:</p> <ul> <li><a href="https://stackoverflow.com/q/1211982/1025391">Can someone explain how the signedness of char is platform specific?</a></li> </ul> <p>Obviously, the size of the <code>char</code> type is 8 bits on your platform. The definition of this quantity is unspecified by the language specification as well. If it were larger, the program may very well print 200, just as you expected. For further reading on this topic:</p> <ul> <li><a href="https://stackoverflow.com/q/881894/1025391">Is char guaranteed to be exactly 8-bit long?</a></li> </ul> <p>Also note, that it is not specified by the standard that integer types must use the two's complement binary representation. On a different platform, the cast may even produce a completely different result. For further reading:</p> <ul> <li><a href="http://en.wikipedia.org/wiki/Signed_number_representations" rel="nofollow noreferrer">http://en.wikipedia.org/wiki/Signed_number_representations</a></li> <li><a href="http://en.wikipedia.org/wiki/Signed_number_representations#Comparison_table" rel="nofollow noreferrer">http://en.wikipedia.org/wiki/Signed_number_representations#Comparison_table</a></li> </ul>
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    1. POCan someone tell me why this program prints -56?
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    1. USmoooeeeep
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    1. COBut the OP is using `char`, not `signed char`. The signedness of `char` is implementation-defined, so this answer isn't complete.
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      1. USLundin
    2. COI do not think that http://stackoverflow.com/q/17045231/1025391 should be quoted for the explanation “the cast may even produce a completely different result”. The linked question is about representations. The semantics of the cast to `T1` of a value of type `T2` do not have to have anything to do with the representation of either `T1` or `T2`.
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      1. USPascal Cuoq
    3. CO@PascalCuoq I found a better reference now, I think.
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