指针增量

问题描述

限时删除！！

亲爱的，


哪个是正确的？


假设我们为100个字节分配内存，


int * PtrMemoryBlock =（int *）malloc（100）;


如果我这样做


PtrMemoryBlock = PtrMemoryBlock + 10;


它会指向第10个字节的内存loaction，由

malloc分配的memro或它将指向10 + 100（Byte Allocated by malloc）

记忆力？


提前致谢

Ranjeet

解决方案

两者都没有，

它指向内存（PtrMemoryBlock只是指向）第N个的确定

byte，

和，N = 10 * sizeof（int）。

pointer" PtrMemoryBlock"声明指向int类型，所以当

对指针添加10时，在* / b $ b事实中添加了10 * sizeof（int）。

Dear All,

Which is correct ?

Let suppose we allocate the memory for the 100 bytes,

int *PtrMemoryBlock = (int *)malloc(100);

If I do

PtrMemoryBlock = PtrMemoryBlock + 10;

will it point to memory loaction of 10th byte, memroy allocated by
malloc OR it will point to the 10 + 100 (Byte Allocated by malloc)
memory loaction ?

Thanks in advance
Ranjeet

解决方案

No. It will point to the 10th int.

Richard

neither ,
it points to memory (PtrMemoryBlock just points to) loaction of Nth
byte,
and, N = 10 * sizeof(int).
pointer "PtrMemoryBlock" is declared to point to int type, so while
doing an addition of 10 to the pointer , 10 * sizeof(int) is added in
fact.

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