string literal in c

Question

Why is the following code illegal?

typedef struct{
   char a[6];
} point;

int main()
{
   point p;
   p.a = \"onetwo\";
}

Does it have any

Answer 1

You can never assign to arrays after they've been created; this is equally illegal:

int foo[4];
int bar[4];
foo = bar;

You need to use pointers, or assign to an index of the array; this is legal:

p.a[0] = 'o';

If you want to leave it an array in the struct, you can use a function like strcpy:

strncpy(p.a, "onetwo", 6);

_{(note that the char array needs to be big enough to hold the nul-terminator too, so you probably want to make it char a[7] and change the last argument to strncpy to 7)}