Size of the struct should be sum of all the data member, which is: Size of int a+ size of int* b +size of char c+ size of char* d Now considering the 64-bit system, Size of int is 4 Bytes Size of character is 1
Size ofdouble:8bytes Size ofchar:1bytes Size of array:40bytes Number of elements in array:10Size ofstruct:16bytes Size of variable s:16bytes Size of pointer:8bytes 1. 2. 3. 4. 5. 6. 7. 8. 5. 总结 sizeof关键字在C语言中用于计算数据类型或变量在内存中占用的字节数。它是一个编译时...
size_t 大小:关于 size_t 占用的空间百度百科的描述是:经测试发现,在 32 位系统中 size_t 是 4 字节的,而在 64 位系统中,size_t 是 8 字节的,这样利用该类型可以增强程序的可移植性。 疑问:上面的描述看似很有道理,但是很多人在测试的时候发现,为什么测试环境明明是 64 位的系统,sizeof(size_t) 的值...
意思是,在 GNU C中,指向void指针和指向函数的指针支持加法和减法操作。这是通过将void或函数的大小视为1来实现的。 因此,sizeof操作符也可以用于void和函数类型,并返回 1。选项-Wpointer-arith会在使用这些扩展时发出警告。发布于 2025-05-11 14:10・北京赞同4918 条评论 分享喜欢收藏...
64-bit 操作系统中,事实标准为LP64, int - 4字节, long, pointer 是8字节 在linux操作系统中,参见头文件 int-ll64.h For 32-bit systems, the 'de facto' standard is ILP32 - that is, int, long and pointer are all 32-bit quantities. ...
sizeof 研究(转载) 1. 定义: sizeof是何方神圣? sizeof乃C/C++中的一个操作符(operator)是也,简单的说其作用就是返回一个对象或者类型所占的内存字节数。 MSDN上的解释为: The sizeof keyword gives the amount of storage, in bytes, associated with a variable or a type (including aggregate types)....
>Cahnging nInLen to size_t will inusre the assignment is >always safe but may affect other portions of your code >because size_t is an unsigned type. It may also affect other code because under Win64 a size_t is 64 bits while an int is still 32 bits. Wayne 中文...
and full range of pointer on 64-bit machine is 64 bits... Hope it helps you to make a decision! Thursday, September 24, 2009 9:31 AM Marius hi! How could you be sure of that size_t is typedef for unsigned int. I run simple tester on visual studio 9 on 32 bit machine platfor...
c,d,sizeof(unsignedint),sizeof(int));return0;}思考：这里的sizeof("Hello"),sizeof(str1),...
Size of pointer: 8 bytes Size of data pointed by pointer: 4 bytes This C program shows the size of a pointer and the size of the data it points to. It sets num = 10 and ptr as a pointer to num. sizeof(ptr) gives the size of the pointer itself, while sizeof(*ptr) gives the...