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You said this is a local variable and will be stored in stack. Did you mean to say variable "test" will be stored in stack?But when string manipulation occurs i.e test += arg1; isn't it that the size of test will increase in heap or is it stack?

goddland_16
– goddland_16

2017-03-14 12:43:12 +00:00
Commented Mar 14, 2017 at 12:43
As Edgar already wrote, there are two items: the instance (keeping the administration), this is probably the pointer and possible the size of the string; this will be kept in stack. The memory allocation will never change. However, the characters itself are stored on the heap since this will change. When you add a character, depending on the implementation, possibly the whole string will be copied from one heap space to another location in the heap (using one more byte), and the pointer (stored in the stack) is pointing to the new allocated space in the heap.

Michel Keijzers
– Michel Keijzers

2017-03-14 12:58:55 +00:00
Commented Mar 14, 2017 at 12:58
Also you can use the F(" ..." ) way, this puts the fixed strings in flash memory (of course for altering strings this is not possible).

Michel Keijzers
– Michel Keijzers

2017-03-14 13:00:00 +00:00
Commented Mar 14, 2017 at 13:00
Yes, Explanation is good.

goddland_16
– goddland_16

2017-03-15 07:14:29 +00:00
Commented Mar 15, 2017 at 7:14

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