Which one (Array or pointer) is located in read only portions of memory ?
In other words
char* x = "hello";
x[1] ='m';
I get error here
but when I use array like
char x[] ="hello";
x[1] ='m';
I don't get error
Also when I use malloc I get error too
char* x =malloc(sizeof(char)*10);
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So what is the difference if I use malloc and don't use like char x[] ="hello"; and why I get error when I use either one and I don't get error when I use array?
You need to post ACTUAL error messages.
"I got an error" isn't enough information to tell you how you messed up.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Hi Amir,Originally Posted by AmirHossein H-m
When you assign a character string pointer (char* x = "hello"), it's really just a pointer pointing to the memory location of "hello". As such, the string is read only. In your first example, you're treating the pointer as if it were an array, when it's really just a pointer to a character array.
To change the string, you would need to copy it (or initialize it) in an array and change it like you did in your second example.
I don't think that this is an appropriate situation for malloc(). Hope this helps.
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