Beginner question

[RahulDev]

I am having a basic question..How do (Right to left or left to right) compiler process the assignment statement in C

Ex: int i = 5

I feel compiler will create memory for storing variable if type ' int ' of name 'a' and assign 5 to it. That is it from left to right.

Is my understanding is correct or not ?

2. How about the following case

char *p = "aabbcc"
char *q = "aabbcc"

I heard in the second case compiler will search for "aabbcc" string and assign pointer to that one. so in this case both will point to the one constant string named '"aabbcc"
Is my understanding is correct?

[godsent]

int i= 5 means that u are declaring a variable i with datatype integer..n u r assigning 5 to i..

[rgb]

char *p = "aabbcc";
char *q = "aabbcc";

there will be 2 pointers here, both will have the same value (as per assignment statement) but not the same address space (not point on one constant string)

you can test this by assigning a different value on any of the two pointer and showing the content of the pointer using [printf("%s",p);]

[Banfa]

char *p = "aabbcc";
char *q = "aabbcc";

there will be 2 pointers here, both will have the same value (as per assignment statement) but not the same address space (not point on one constant string)

you can test this by assigning a different value on any of the two pointer and showing the content of the pointer using [printf("%s",p);]

Actually the pointers will have different values, what the point to will be the same data but just because the 2 strings given are the same.

However, although it is quite unusual, a few compilers (mainly on embedded platforms) will actually assign the pointers the same value. This is because some platforms give string constants the type const char so the data pointed to can not be changed and would be stored in ROM. making the pointers point to the same(constant) thing saves space. However in such a case these lines would (should) produce a warning or error because you would be trying to assign a const char * to a char *.

I have to say that although I know things like this exist in theory I have never used a compiler that did this.