Mr.π的博客

代码 #include <iostream> #include <vector> using namespace std; int max = 0; int f_max(int a, int b) { if (a < b) return b; return a; } void func(int (&arr)[5][5], int x, int y, int row, int col, int sum) { if (x < row &amp..

1、两个数交换，不用temp x = x ^ y; y = x ^ y; x = x ^ y; x = x ^ y; y = x ^ y; x = x ^ y; 2、