char *a = "hello";
char b[] = "hello";
char *c = malloc(12);
What do these do, what's the difference in where the memory is stored?

Question

char *a = "hello";
char b[] = "hello";
char *c = malloc(12);
What do these do, what's the difference in where the memory is stored?

Stanley · Accepted Answer

char *a = "hello";  // pointer a on the stack, point to the "hello", which in in the  static memory zone
char b[] = "hello"; // char array b on the stack, make a copy of "hello“ to array b
char *c = malloc(12);  // allocate 12 bytes space on the heap, and pointer c on the stack pointing to the allocated space

Mamikon · Answer

warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]
     char* p = "hello";
error: invalid conversion from ‘void*’ to ‘char*’ [-fpermissive]
     char* c = malloc(12);

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