W3School TIY Editor

#include <iostream> #include <vector> #include <algorithm> using namespace std; int main() { int a = 10, b = 25; cout << "交换前: a = " << a << " | b = " << b << "\n"; swap(a, b); cout << "交换后: a = " << a << " | b = " << b << "\n"; return 0; }