Remember from your other thread, what you get when you do sizeof(pointer) ? It takes you completely literally and gives you the size of the pointer. Which means you only allocate 4 or 8 bytes for the size of each index, and end up going way beyond the end when you loop.
That was really subtle and, fundamental, too. I can't get it until you pointed out!
This bugged me sooooo much, and I had thought my understanding is totally wrong. Fortunately I am on the right track, not that far away from right, at least.
Thank you very much again!
Hello, I am trying to reverse complement one string and reverse another (NO complement!), both with pointer. My code compiled without error, but did not do the job I wanted.
// STEP 1: declare the type of file... (5 Replies)
I'm newbie learner. My all friend use windows just only me use linux.
so i can't solve any problem by myself. i need a solution.
how can i use pointer as a string.
This code work on... (6 Replies)
my question is not about How code can be rewritten, i just wanna know even though i am not using read only memory of C (i have declared str) why this function gives me segfault :wall:and the other code executes comfortably though both code uses same pointer arithmetic.
... (4 Replies)
If one wants to get a start address of a array or a string or a block of memory via a function, there are at least two methods to achieve it:
(1) one is to pass a pointer-to-pointer parameter, like:
int my_malloc(int size, char **pmem)
if(*pmem==NULL)... (11 Replies)
i am having a string like
" X1 " ---> string lenght is 30
I have stored this to a chararry . ref
so here ref = " X1 "
now i trim the left space by my function . Si the string now becomes
"X1 " ---> string lenght is 15... (3 Replies)
i have a function:
char *pcCityIdToCountryName(ADMIN_DB_DATA *pstHEader, unit uiCityID)
this returns a pointer to CountryName if cityId is given.
to retrieve countryname i give:
CountryName = pcCityIdToCountryName(..................);
but when i compile it is giving :... (5 Replies)
I have a problem reading characters from keyboard with the scanf function.
Here there is a little piece of code:
/* The last 3 libraries are included because in the real program I use some... (4 Replies)