C++交换两个数据的值

#include <iostream>void jiaohuan(int & a,int & b){using std::cout;using std::endl;int c;c = a;a = b;b = c;std::cout << "a = " << a << std::endl;cout << "b = " << b << endl;}int main() {using namespace std;int a = 10;int b = 20;jiaohuan(a,b);cin.get();return 0;}

交换a b两个的值，cin.get();//读取一个键盘输入。