c++ - If an array name is treated as a pointer, why do I get a compile time error of Lvalue required when incrementing an array?

Question

int main()
{
  int a[]={2,3,4,5,6};
  int j;
  for(j=0;j<5;j++)
  {
    printf("%d
",*a);
    a++; 
  }
  return;
}

gives "Lvalue required" error but

int main()
{
int a[]={2,3,4,5,6};
int *p,j;
p=a;
for(j=0;j<5;j++)
{
  printf("%d
",*p);
  p++; 
 }
return;
}

doesn't. why????

Answer 1

Though closely related, arrays are not pointers. The name of the array is just a label to identify some allocated memory (hence, the Lvalue error when you try to modify it).