c get pointer size
You can't, I'm afraid. You need to pass the length of the array to anyone who needs it. Or you can use a std::array or std::vector or similar, which keep track of the ... ,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 *). ,That's not something you can do in C without maintaining the information yourself. You created the arrays, so you knew their sizes at one point, you just have to ... ,It is impossible to know how much memory was allocated by just the pointer. doing sizeof (p) will get the size of the pointer variable p which it takes at compile ... ,What C programmers do is store the size of the array somewhere. ..... stated, you cannot get this information from the decayed pointer value of the array alone. ,Even on a plain x86 32 bit platform, you can get a variety of pointer sizes, try this .... Technically speaking, the C standard only guarantees that sizeof(char) == 1, ... ,When you are saying p + 1 , meaning that p + 1 * sizeof(int) . As I've mentioned here, the formula is ???????????????????????????? = ???????????????? + ???????????????????? × ????????????????. That's why you get ... ,sizeof(void*) generally yields the size of pointers on your architecture, although ... Here you can get an idea of the situation with something like sizeof(void (*)()) ... ,,Pointers generally have a fixed size, for ex. on a 32-bit executable they're usually ... that absolutely has to have a pointers of a certain size, you'd better check it!
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 c get pointer size 相關參考資料
c++ how to get the length of a pointer array? - Stack Overflow
You can't, I'm afraid. You need to pass the length of the array to anyone who needs it. Or you can use a std::array or std::vector or similar, which keep track of the ... 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 *). https://stackoverflow.com Getting the size of the data of a Pointer - Stack Overflow
That's not something you can do in C without maintaining the information yourself. You created the arrays, so you knew their sizes at one point, you just have to ... https://stackoverflow.com how can i know the allocated memory size of pointer variable in c ...
It is impossible to know how much memory was allocated by just the pointer. doing sizeof (p) will get the size of the pointer variable p which it takes at compile ... https://stackoverflow.com How to find the 'sizeof' (a pointer pointing to an array)? - Stack ...
What C programmers do is store the size of the array somewhere. ..... stated, you cannot get this information from the decayed pointer value of the array alone. https://stackoverflow.com Is the sizeof(some pointer) always equal to four? - Stack Overflow
Even on a plain x86 32 bit platform, you can get a variety of pointer sizes, try this .... Technically speaking, the C standard only guarantees that sizeof(char) == 1, ... https://stackoverflow.com Pointers, sizeof() and address in C++ - Stack Overflow
When you are saying p + 1 , meaning that p + 1 * sizeof(int) . As I've mentioned here, the formula is ???????????????????????????? = ???????????????? + ???????????????????? × ????????????????. Tha... https://stackoverflow.com Size of a pointer in C - Stack Overflow
sizeof(void*) generally yields the size of pointers on your architecture, although ... Here you can get an idea of the situation with something like sizeof(void (*)()) ... https://stackoverflow.com What is the size of a pointer in C? - Quora
https://www.quora.com 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 ... that absolutely has to have a pointers of a certain size, you'd better check it! https://stackoverflow.com |