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When
an error condition is detected, an exception can be
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created
and control transferred to an exception handler by
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executing
a throw expression.
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A
throw expression consists of the operator throw
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optionally
followed by an operand of some type.
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if (i != 42) //detect error condition
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throw
i; //throw an exception
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This
causes the program to abort whenever an exception
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occurs.
The abort occurs because the default in C++ is to
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abort
whenever an exception is thrown that is not
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explicitly
processed by the program. This is probably
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only
useful for the simplest programs.
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