sizeof pointer
2) char *b[20]; //This is an array of 20 pointers to char. 3) char (*c)[20]; //This is a pointer to an array of 20 chars. 4) char (*d)[20][40];. 我寫了程式來驗證: vim main.c #include. main() char *x; char **a; char *b[20]; char (*c)[20]; char (*d)[20][40];. pri, sizeof(s1) is the size of the array in memory, in your case 20 chars each being 1 byte equals 20. sizeof(s) is the size of the pointer. On different machines it can be a different size. On mine it's 4. To test different type sizes on your machine you
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 sizeof pointer 相關參考資料
蘋果小豬研究室: 陣列名稱與指標 - 蘋果小豬筆記
陣列名稱與指標. 定義一個ptr pointer, point to 1024 個char size 的記憶體區塊，. char *ptr = malloc( sizeof(char) * 1024);. sizeof(ptr) 所得到的是該指標本身的大小，而sizeof (*ptr) 所得到的是，指標指向的記憶體區塊之第一個item 之型態大小。 char array[1024];. size... http://applezu.netdpi.net 幾個容易混淆的pointer宣告與大小- 易春木
2) char *b[20]; //This is an array of 20 pointers to char. 3) char (*c)[20]; //This is a pointer to an array of 20 chars. 4) char (*d)[20][40];. 我寫了程式來驗證: vim main.c #include. main() char *x; char *... http://eeepage.info c - How does sizeof() work for char* (Pointer variables)? - Stack ...
sizeof(s1) is the size of the array in memory, in your case 20 chars each being 1 byte equals 20. sizeof(s) is the size of the pointer. On different machines it can be a different size. On mine it... https://stackoverflow.com c++ - What is the size of a pointer? - Stack Overflow
Pointers generally have a fixed size, for ex. on a 32-bit executable they're usually 32-bit. There are some exceptions, like on old 16-bit windows when you had to distinguish between 32-bit point... https://stackoverflow.com c - How to find the 'sizeof' (a pointer pointing to an array ...
No, you can't. The compiler doesn't know what the pointer is pointing to. There are tricks, like ending the array with a known out-of-band value and then counting the size up until that value... https://stackoverflow.com c++ - Is the sizeof(some pointer) always equal to four? - Stack ...
The guarantee you get is that sizeof(char) == 1 . There are no other guarantees, including no guarantee that sizeof(int *) == sizeof(double *) . In practice, pointers will be size 2 on a 16-bit syste... https://stackoverflow.com Get size of pointer in C - Stack Overflow
Given an arbitrary type (I've chosen char here, but that is for sake of concrete example): char *p;. You can use either of these expressions: sizeof(p) sizeof(char *). Leading to a malloc() call ... https://stackoverflow.com Size of pointer, pointer to pointer in C - Stack Overflow
char *c[] = "Mahesh", "Ganesh", "999", "333"};. c is an array of char* pointers. The initializer gives it a length of 4 elements, so it's of type char *[4]... https://stackoverflow.com What is the size of a pointer in C? - Quora
The size of a pointer depends on many factors - including the CPU architecture, compiler, Operating System etc. Usually the size is equal to the word size of the underlying processor architecture, and... https://www.quora.com Rookie worker: C語言- 指標變數(pointer variable)
永遠不要忘記，一個指標變數無論其TYPE如何，指標變數的大小只會等於4bytes， sizeof(指標變數) = 4 bytes */ EX. typedef struct eTable_s qlink_t link; eEntry_t e_entry; logEntry_t *logTable; logEntry_t *log_next; int32 log_qcnt; } eTable_t... http://aluba-pantene.blogspot. |