传递参数给线程
#include <iostream>
#include <thread>
#include <windows.h>
using namespace std;
void switch_ab (int &a, int &b) //参数是引用可更改
//void switch_ab (int &a, int &b) //不可更改
{
int temp = b;
b = a;
a = temp;
cout << "a:" << a << endl;
cout << "b:" << b << endl;
}
int a = 4;
int b = 5;
thread t(switch_ab, ref(a), ref(b)); //传入引用
//thread t(switch_ab, a, b); //不可更改
int main()
{
t.join();
cout << "a1:" << a << endl;
cout << "b1:" << b << endl;
while (1);
}