How much stack can a function use in C ++

kuo123456

Just
void foo ()
{
   char * p = new char [count]
}

So what is the maximum of this count? ? Is it 640k or 64k?

babymaya

This is the heap ...

鸟哥

The size of the stack depends on the implementation.

kuo123456

Oh sorry the habit is wrong
should be
void foo ()
{
char p [count]
}

zhilong821

...

Impression is only 64K

In general, if the array does not exceed 0.1k, I will choose to use the stack
But if I have a slightly larger array, I would choose to use the heap,
In case recursion is used, the stack is probably not enough

kuo123456

err ....

Under dev-cpp
int main (void)
{
    char a [(1024 + 512 + 256 + 128 + 64 + 32 + 16 + 2) * 1024];
}
Not wrong

int main (void)
{
    char a [(1024 + 512 + 256 + 128 + 64 + 32 + 16 + 2 + 1) * 1024];
}
This way it's wrong

hzxszmh

Compiler related

boxer2005

char * p = new char [count]
-------------------------------------------------- ----------------------------
Your question should be changed to "how much heap a function can use".

food0012

Look at the options when you compile, you can choose the size of the stack space
At the same time, the stack of the same thread is used together, there is no concept of the maximum value that a function can use
It also depends on how much stack space is used before calling this function

kuo123456

int main (void)
{
char a [(1024 + 512 + 256 + 128 + 64 + 32 + 16 + 2 + 1) * 1024];
}

Well, such a sentence, the other parts occupy about 14k of memory, which is a bit scary.