Thread: accessing malloc'ed struct's with [], ->, and .

I wrote this code as an experiment, before I tried same thing with my project. However, can't get it to compile. See my comments inside the code:

Code:

#define MAX_T 42
#define MAX_CHARS 42
#define SOME_INT 42

struct t_container {
	struct t_named *ptrFirst;
};

struct t_named {
	char name[MAX_CHARS];
	int x;
};

int function(int index, struct t_container *ptrContainer);

int main(){
	int i;
	struct t_container *new;

	new = malloc( sizeof *new );
	new->ptrFirst = malloc(  MAX_T * sizeof *new->ptrFirst  );
	
	for(i=0; i<MAX_T; i++) function(i, new);
	
	return 1;
}

int function(int index, struct t_container *ptrContainer)
{
	ptrContainer->ptrFirst[index].name = "Arbitrary string./n";
	// error:  incompatible types in assignment

	ptrContainer->ptrFirst[index].x = SOME_INT;
	return 1;
}

Read earlier posts about pointer arithmetic, and about the difference between "->" and ".", but I'm still a bit muddled. Why does ptrContainer->ptrFirst[index].x work and ptrContainer->ptrFirst[index]->x cause an "invalid type" error?

Thanks all!