[Bug c++/97278] New: increment or decrement operator on the same object
tangyixuan at mail dot dlut.edu.cn
gcc-bugzilla@gcc.gnu.org
Sat Oct 3 06:43:31 GMT 2020
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97278
Bug ID: 97278
Summary: increment or decrement operator on the same object
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tangyixuan at mail dot dlut.edu.cn
Target Milestone: ---
Hi, the parameters of 'func' are based on the values of 'i'. if 'a' is 4, does
it mean that 'i' is increased after '++i' and 'i++'? So, why the value of 'b'
is 2?
$ cat s.cpp
#include <iostream>
using namespace std;
int func(int a, int b)
{
cout << a << " " << b <<"\n";
return a << b;
}
int main()
{
int i = 2;
cout << func(++i, i++) << "\n";
};
$ g++ s.cpp
$ ./a.out
4 2
16
$ clang++ s.cpp
$ ./a.out
3 3
24
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