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

Arrays are non modifiable lvalues. So you cannot assign to them. Left side of assignment operator must be an modifiable lvalue.

However you can initialize an array when it is defined.

For example :

 char a[] = "Hello World" ;// this is legal
 char a[]={'H','e','l','l','o',' ','W','o','r','l','d','\0'};//this is also legal

 //but

 char a[20];
 a = "Hello World" ;// is illegal 

However you can use strncpy(a, "Hello World",20);