翻訳と辞書
Words near each other
・ out-of-band
・ outer join
・ outline font
・ output
・ output device
・ outside awareness port
・ outside-in testing
・ outsourcing
・ overclocking
・ overdrive
overflow
・ overflow bit
・ overflow flag
・ overflow pdl
・ overhead
・ overloading
・ overriding
・ overrun
・ overrun screw
・ overuse strain injury


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overflow : FOLDOC
overflow
The condition that occurs when the result of a calculation is too big to store in the intended format. For example, the result of adding one to 255 cannot be represented as an {unsigned}, eight-bit integer. In a {signed integer} representation, overflow can occur when an integer becomes either too positive or too negative.
Overflow can also occur in the exponent of a floating-point number representation. The term "underflow" is sometimes used for negative overflow of the exponent.
Ignoring overflow will result in nonsensicle results such as 255 + 1 = 0. At the hardware level, the ALU typically indicates overflow by setting an overflow flag bit which the program can test. Programming languages will typically respond to overflow by raising some kind of signal or other error condition to halt normal execution.
Some languages attempt to avoid overflow by providing (optional) variable length number representation ({multiprecission arithmetic}) so that the maximu


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