2016年1月27日 · That's why when you dereference pp[0] explicitly, with *pp[0], you are dereferencing it effectively twice: First you look at the contents of the address 0x2000, which is 0x1000, and then you dereference that in order to read the memory at 0x1000.

Where there's smoke, they pinch back.

2023年1月13日 · First of all, you don't get to pick the decomposition. So one decomposition you'd need to handle is $x = \varepsilon$, $y = 00$, $z = 0^{2p-2}$. Now if we pump $y$ for $i$ …

2022年11月2日 · The expression ++*p has two operators of same precedence, so compiler looks for associativity. Associativity of operators is right to left. Therefore the expression is treated as ++(*p). Therefore the output of first program is “arr[0] = 11, arr[1] = 20, *p = 11“.

2022年4月19日 · The p[n] syntax is syntactic sugar for *(p + n). So p[0] is *(p + 0), which is *p, and since p points to n, *p is the value of n, which is 25. Now, p[1] is *(p + 1).

2012年7月3日 · The standard format specifier for pointer values is %p. Does the pointer p1 or p2 point to address 0x0? Not necessarily. They point at whatever the null pointers point at on your platform. Does the statement printf("p1 : %x\n", p1); outputs p1 : …

Zero to the power of zero, denoted as 0 0, is a mathematical expression with different interpretations depending on the context.

0P (zero P) or 0-P may refer to: -polytope, a geometric form; see Zero-dimensional space. 0-point energy or zero-point energy, the lowest possible energy that a quantum mechanical physical system may have; 0-point field, or the vacuum state in quantum field theory

2015年5月19日 · If $b = 0$, then simulate $T$ on $x$ in such a way that there are $2T(x)+1$ different paths, and in all of them return $1$. If $b = 1$, then have $2y$ different paths, all of …

2017年12月19日 · We know $\oplus P^{\oplus P}=\oplus P$, $PP^{\oplus P}\subseteq P^{PP}$ and $NP\subseteq PP$. Is $\oplus P^{PP}=PP$? Why is it difficult to show …