-
sizeof is a
unary operator in the C and C++
programming languages that
evaluates to the
storage size of an
expression or a data type,
measured in units...
- memset(&sa, 0,
sizeof sa); sa.sin_family = AF_INET; sa.sin_addr.s_addr = htonl(INADDR_ANY); sa.sin_port = htons(7654);
fromlen =
sizeof sa; sock = socket(PF_INET...
- of an
array A, as in n =
sizeof A[0]. Thus, the
number of
elements in a
declared array A can be
determined as
sizeof A /
sizeof A[0]. Note, that if only...
-
expression cannot be the
operand of
sizeof. Therefore,
sizeof (int) * x is
interpreted as (
sizeof(int)) * x and not
sizeof ((int) * x). The
precedence table...
-
result of the
sizeof operator differs. In this example,
sizeof(array) will
evaluate to 5*
sizeof(int) (the size of the array),
while sizeof(ptr) will evaluate...
- W_OK) != 0) { exit(1); } fd = open("file", O_WRONLY); write(fd, buffer,
sizeof(buffer)); Here,
access is
intended to
check whether the real user who executed...
- array/member
access 2 ! ~ - + * &
sizeof type cast ++ -- (most)
unary operators,
sizeof and type
casts (right to left) 3 * / % MOD...
- *s) { char buf[15]; memset(buf, 0,
sizeof(buf)); strncat(buf, s,
sizeof(buf)); //
Final parameter should be:
sizeof(buf)-1 } Off-by-one
errors are common...
-
functionality that may not be
possible to
define as a user-defined
function (i.e.
sizeof in C) or has
syntax different than a
function (i.e.
infix addition as in...
- we can use realloc. int *arr = malloc(2 *
sizeof(int)); arr[0] = 1; arr[1] = 2; arr = realloc(arr, 3 *
sizeof(int)); arr[2] = 3; Note that
realloc must...
