WebAug 23, 2001 · 非常感谢。. yhq 2001-08-22. sizeof (a) 就是数组a的按byte记的长度, 即 int [5]的长度. sizeof (int) 是int型的长度.无论int类型占几个byte. sizeof (a)/sizeof (int) 都等于5,也就是数组a的元素个数. sizeof可以跟一个变量名或数据类型名. WebFeb 15, 2024 · sizeof 运算符返回给定类型的变量所占用的字节数。. sizeof 运算符的参数必须是一个 非托管类型 的名称,或是一个 限定 为非托管类型的类型参数。. sizeof 运算 …
C语言基础——sizeof的用法总结_「已注销」的博客-CSDN博客
WebJan 13, 2015 · 对于堆区分配的数组,int *A = new int[N], memset(A, 0, sizeof(A[0])*N) 也可以达到效果,但要注意,这里第三个参数不能使用sizeof(A),而要指明byte数。 要想知道原因,需要知道sizeof 运算符的作用。它返回的是“占用的栈空间字节数”。如果数组用int A[N]的形式申明,那么 ... WebAug 23, 2001 · 非常感谢。. yhq 2001-08-22. sizeof (a) 就是数组a的按byte记的长度, 即 int [5]的长度. sizeof (int) 是int型的长度.无论int类型占几个byte. sizeof (a)/sizeof (int) 都 … greenpeace intl seafood red list
关于C/C++中的sizeof - 知乎 - 知乎专栏
WebApr 28, 2024 · Also consider the pros/cons from a reviewer point of view.. size_t a_size1 = sizeof(a)/sizeof(int); size_t a_size2 = sizeof(a)/sizeof(a[0]); The type definition of a may not be near these lines of code, perhaps in a .h file.. To check either line of code, we need to know if a is in fact an array and not a pointer. This is a binary consideration that is … WebFeb 13, 2014 · I know it's equal to sizeof (int). The size of an int is really compiler dependent. Back in the day, when processors were 16 bit, an int was 2 bytes. Nowadays, it's most often 4 bytes on a 32-bit as well as 64-bit systems. Still, using sizeof (int) is the best way to get the size of an integer for the specific system the program is executed on. Web下面程序的功能是建立一个有3个结点的单循环链表,如下图所示然后求各个结点数值域data中数据的和,请填空。 fly rod scott