dfs

#include <iostream>
using namespace std;

void sort2(int *a, int *b);

int main()
{
  int u = 2;
  int v = 3;
  int w = 4;
  int x = 1;

  cout << "u = " << u << ", v = " << v << ", w = " << w << ", x = " << x << endl;

  sort2(&u, &v);
  sort2(&w, &x);

  cout << "u = " << u << ", v = " << v << ", w = " << w << ", x = " << x << endl;

  return 0;
}
void sort2(int *a, int *b)
{
  if (*a > *b)
  {
    int temp = *a;
    *a = *b;
    *b = temp;
  }
}

转载于:https://blog.51cto.com/waiting/133406