Pointers & Constants | outaink

Data is constant

  int main() {
      const int x = 10;
      const int* ptr = &x;
 
      return 0;
  }

x is constant, ptr is not constant

Pointer is constant

  int main() {
      int x = 10;
      int* const ptr = &x;
 
   	// int y = 20;
    	// 
      return 0;
  }

Both data and pointer are constant

int main() {
    const int x = 10;
    const int* const ptr = &x;
 
    return 0;
}