2.#
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名字遮蔽
1#include <iostream>
2
3using namespace std;
4
5int x = 6;
6
7int main() {
8 int x = 5;
9 {
10 int x = 2;
11 cout << "1:" << x++ << '\n';
12 cout << "2:" << ::x << '\n';
13 cout << "3:" << x << '\n';
14 if (x / 4) {
15 cout << "True!";
16 } else {
17 cout << "False!";
18 }
19 }
20 cout << "4:" << x;
21 return 0;
22}