Inconsistent lvalue required error when incrementing array variable

Question

I am getting \"lvalue required as increment operand\" while doing *++a. Where I am going wrong? I thought it will be equivalent to *(a+1). This beh

Answer 1

++a and a + 1 are not equivalent. ++a is the same as a = a + 1, i.e it attempts to modify a and requires a to be a modifiable lvalue. Arrays are not modifiable lvalues, which is why you cannot do ++a with an array.

argv declaration in main parameter list is not an array, which is why you can do ++argv. When you use a[] declaration in function parameter list, this is just syntactic sugar for pointer declaration. I.e.

int main(int argc, char *argv[])

is equivalent to

int main(int argc, char **argv)

But when you declare an array as a local variable (as in your question), it is indeed a true array, not a pointer. It cannot be "incremented".