const char * a is NOT a pointer to immutable char

main.cpp

#include<iostream> 

using namespace std;

int main(int argc, char** argv) {
	char c = 'a';
	const char * a = &c;
	// *a = 'b'; // error: read-only variable is not assignable
	cout << *a << endl; //a
	c = 'b';
	cout << *a << endl; //b
	return 0;
}