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Precedence of postfix ++ and prefix ++ in C/C++
Here we will see the precedence of postfix++ and prefix++ in C or C++. The precedence of prefix ++ or -- has higher priority than dereference operator ‘*’ and postfix ++ or -- has priority higher than both prefix ++ and dereference operator ‘*’.
When ptr is a pointer, then *ptr++ indicates *(ptr++) and ++*prt refers ++(*ptr)
Example
#include<iostream> using namespace std; int main() { char arr[] = "Hello World"; char *ptr = arr; ++*ptr; cout << *ptr; return 0; }
Output
I
So here at first ptr is pointing ‘H’. after using ++*ptr it increases H by 1, and now the value is ‘I’.
Example
#include<iostream> using namespace std; int main() { char arr[] = "Hello World"; char *ptr = arr; *ptr++; cout << *ptr; return 0; }
Output
e
So here at first ptr is pointing ‘H’. after using *ptr++ it increases the pointer, so ptr will point to the next element. so the result is ‘e’.
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