multiplication of infinity by a nonzero gives infinity (even for complex arguments)īecause in C, any complex value with at least one infinite part is an infinity even if its other part is a NaN, the usual arithmetic rules do not apply to complex-complex multiplication.multiplication of infinity by zero gives NaN and FE_INVALID is raised.if one operand is a NaN, the result is a NaN.The binary operator * performs multiplication of its operands (after usual arithmetic conversions) following the usual arithmetic definitions, except that first, usual arithmetic conversions are performed.The behavior is defined only if the result fits in ptrdiff_t.įor the purpose of pointer arithmetic, a pointer to an object that is not an element of any array is treated as a pointer to the first element of an array of size 1.ģ) remainder. P1 -P2 has the value equal to I -J and the type ptrdiff_t (which is a signed integer type, typically half as large as the size of the largest object that can be declared).If the pointer P1 points at an element of an array with index I (or one past the end) and P2 points at an element of the same array with index J (or one past the end), then.Note that executing p-1 when p points at the first element of an array is undefined behavior and may fail on some platforms. The behavior is defined only if both the original pointer and the result pointer are pointing at elements of the same array or one past the end of that array. P -N is a pointer that points at an element of the same array with index I-N.P +N and N +P are pointers that point at an element of the same array with index I+N.If the pointer P points at an element of an array with index I, then.work in progress // note: take part of the c/language/conversion example Pointer arithmetic infinity plus the negative infinity is NaN and FE_INVALID is raisedĬomplex and imaginary addition and subtraction are defined as follows (note the result type is imaginary if both operands are imaginary and complex if one operand is real and the other imaginary, as specified by the usual arithmetic conversions):.infinity minus infinity is NaN and FE_INVALID is raised.if one operand is NaN, the result is NaN.then, the values of the operands after conversions are added or subtracted following the usual rules of mathematics (for subtraction, rhs is subtracted from lhs), except that.
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