如何传入万能指针void以及使用简单示例

/// <summary>
/// 结构体
/// </summary>
struct MyStruct
{
    
    
	int a=100;
	string str="";
};

/// <summary>
/// 用来测试的函数
/// </summary>
/// <param name="a"></param>
/// <param name="str"></param>
/// <param name="out"></param>
void test(int a, string str, void* out) {
    
    
	MyStruct* result = (MyStruct*)out;//首先赋值了一个有实际类型的指针
	result->a = a;
	result->str = "10000";
}

int main() {
    
    
	
	MyStruct* mystruct=new MyStruct();
	mystruct->a = 1000;
	mystruct->str = "shd";
	auto s = new MyStruct();
	test(983, "",s);
	cout << s->a << "  " << s->str << endl;
}