![]() ![]() In the C11 standard, for unsigned integers, modulo wrapping is the. This is called "wrapping" because the value has "wrapped around" from the high end of the numeric range to the low end. In some applications, such as timers and clocks, it may be desirable to wrap the overflow. If the addition of two positive signed integers overflows - that is, if the result is larger than can be represented - the processor will produce a number that, when interpreted as a 2's complement signed integer, will appear to be negative. Most C programmers are developing for machines which use a 2's complement representation of integers addition and subtraction, with such a representation, is implemented in exactly the same way as for unsigned arithmetic. One prominent example is that of signed integer overflow. Quite a few people have been objecting to this, since it can result in the generated code not doing what the programmer intended the problem is becoming more noticeable over time, as compilers introduce more sophisticated optimisation techniques which are more likely to exploit the notion.
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