c++类成员函数中调用多线程函数_beginthreadex()

Question

#include "stdafx.h"
#include
#include
#include
using namespace std;
class A {
public:
int n;

A(int n) {
    this->n = n;
}
void static run1(A &a);
void static run2(A &a);
void static run(A &a);

};
void A::run1(A &a) {
for (int i = 0; i < a.n; ++ i)
cout << "run1" << endl;
}
void A::run2(A &a) {
for (int i = 0; i < a.n; ++i)
cout << "run2" << endl;
}
void A::run(A &a) {
A * p = &a;
HANDLE h1, h2;
h1 = (HANDLE)_beginthreadex(NULL, 0, A::run1, p, 0, 0);
h2 = (HANDLE)_beginthreadex(NULL, 0, A::run2, p, 0, 0);
}
int main()
{
A a(3);
a.run(a);
return 0;
}
我参考了很多资料，都很零碎。最后我不得已把run1(),run2(),run()全部声明为static，还是报错:"Severity Code Description Project File Line
Error (active) argument of type "void (*)(A &a)" is incompatible with parameter of type "_beginthreadex_proc_type"
"求助！！！！！！

Answer 1

1.因为你的main函数（主函数结束了，而你创建的线程可能还没有跑到，这个完全看运气了），加一个getchar()让主函数不结束，你就能看到效果了
2._beginthreadex需要的参数类型是这个(unsigned int (__stdcall *)(void *))

 int main()
{
    A a(3);
    a.run(a);
    getchar();
    return 0;
}