数组元素指针， 指针数组， 数组指针， 函数指针。 4朵让人纠结的概念

#include <iostream>using std::cout;using std::endl;int foo(double, double);int main() { int arr[5] = {1, 2, 3, 4, 5};// 指向数组元素的指针int* p = arr;for(int i=0; i<5; ++i)cout << p[i] << " ";cout << endl;// 指针数组int* q[3];q[0] = arr;for(int i=0; i<5; ++i)cout << q[0][i] << " ";cout << endl;// 数组指针int (*r) [5];r = &arr;for(int i=0; i<5; ++i)cout << (*r)[i] << " ";cout << endl;// 函数指针typedef int (*FuncPointer) (double, double);FuncPointer fp = foo;cout << "fp: " << fp(1, 3) << endl;cout << "fp: " << (*fp)(3, 1) << endl;system("PAUSE");}int foo(double a, double b){if(a > b)return 1;else return 0;}