我在C ++中的代码有什么问题？

这是代码。

#include <iostream>
#include <cstring> 
using namespace std;
class Headquarter
{
private:
    //num of total warriors
    int totalNum;
public:
int getTotalNum() ;

};
int Headquarter::getTotalNum()
{   return totalNum;    }
int main()
{
    Headquarter a;
    Headquarter *p =&a;
    cout << (p->getTotalNum) << endl;
    return 0;
}

我无法使用g ++，4.8.4进行编译。我不知道这是怎么回事。这是错误的消息：

test.cpp: In function ‘int main()’:
test.cpp:19:7: error: no match for ‘operator<<’ (operand types are                             std::ostream {aka std::basic_ostream<char>}’ and ‘<unresolved>`overloaded function type>’)

cout <<（p-> getTotalNum）<< endl; ^