c++函数指针

c++里面函数也可以作为指针来传递

int sum(int a, int b)j{    return a+b;}void wrapper(int a, int b, int (*p)(int, int)){//*p 可以代表即将传入的函数，为函数指针    cout<<p(a, b)<<endl;}int main(){    wrapper(2, 3, sum);    int (*p)(int, int) = sum;    wrapper(2, 3, p);}

参考：http://harttle.com/2015/07/05/cpp-pointers-and-references.html